Black Dog just bested their best in terms of power with the brand new PhytoMAX-3 series.
The PhytoMAX-3 8S draws 410 watts and delivers 874 μmol/s total photobiological photon flux (PBF) making the series the most efficient grow lights on the market.
What that means for you is the largest coverage area on the market at 6.25 x 6.25 ft for Veg and 5 x 5 ft for Flower/Bloom and an even light across the footprint that penetrates deep below the canopy.
You can also expect to get +2.5 lbs or more of dried, cured and trimmed flower per light.
This is a truly full-spectrum (350-750nm, UV to NIR PBAR) LED plant grow light! The PhytoMAX-3 8S uses only the highest-quality, latest-technology, top-bin LEDs to deliver Black Dog LED's proprietary full-cycle Phyto-Genesis Spectrum® evenly over the entire footprint, with unprecedented PAR levels, canopy penetration and yields!
Recommended for full-cycle growth in spaces (and tents) from 3' x 3' to 5' x 5'
Your plants grow stronger and yield more.
With the larger coverage and higher yields, Black Dog lights pay for themselves within a year.
Black Dog PM-3 8S Quick Summary
- Exceptionally Yields up to 2.5+lbs or more per light!
- Daisy Chain Compatible - up to 20 amps on 1 outlet
- 224 LEDs — deep canopy penetration and even coverage
- True Wattage is 410W
- Maximum flowering space - 5' x 5' — largest usable coverage in the industry and grows more plants with one light
- Dimmable from 15% to 100%
- True full spectrum from UV to IR (280nm to 800nm). Ultraviolet - 3.4% UV (< 400nm)— perfectly tailored for plants' needs
- Pays for itself within a year due to more output at lower cost plus higher and better yields
- 5-year warranty and a 90-day return policy — removes purchasing risk
More Intense Light for Deeper Canopy Penetration
This fixture has 224 high-output 5-watt LEDs that deliver an intense light, which is necessary for deep canopy penetration. The light is delivered evenly throughout the coverage area, eliminating hot spots and leaf burn.
Highest Power LED Grow Light on the Market
The PhytoMAX-3 8SP at 410 actual watts and 874 μmol/s total photobiological photon flux (PBF), these grow lights are our most powerful grow lighting solution to date.
Largest Proven Footprint of any LED Grow Light
Independent spectroradiometer testing has proven that the PhytoMAX-3 8SP footprint is the largest on the market. At the same time, it achieves an evenly covered footprint, meaning no hot spots. You won't have to worry about leaf burn.
Industry's Best Heat Management Maximizes LED Life
This fixture is equipped with ultra-quiet fans that are rated for up to 70,000 hours of use and the largest heat sinks in the industry. Black Dog lights have the best active heat management of all LED lights.
Despite the insane power, this fixture only puts out 1398 BTU, which is not much more than a 700 watt HPS system. Keeping heat down is vital for maximizing the lifespan of LED diodes and for spectrum stability.
Most Efficient Spectrum for Growing Plants
Over 6 years of research and testing has resulted in Black Dog's Phyto-Genesis Spectrum™. It is a true full spectrum, with light ranging from UVA and UVB to far IR. In numbers, it covers wavelengths from 280 nm to 800 nm giving the PM-3 series a significantly wider range on the color spectrum than most grow lights.
This spectrum is ideal for all stages of plant growth. Using one spectrum throughout the grow cycle eliminates the growth stalling that occurs whenever you change the light spectrum mid-grow, such as switching from MH to HPS bulbs.
The Phyto-Genesis Spectrum™ targets photosynthetic (chlorophyll/carotenoid) peaks and also increases production of essential oils via the UV-A light. The inclusion of infrared light helps boost photosynthetic efficiency (see Emerson Effect).
In equal-wattage tests, this spectrum outperforms HPS bulbs, standard MH bulbs, light-emitting ceramic MH bulbs, induction bulbs, fluorescent bulbs and "white" LEDs.
Moreover, the Phyto-Genesis Spectrum appears white to the human eye, which means you can easily monitor plant health. If you've ever grown below a traditional pinkish LED light, you know how hard it can be to see problems and address them in time.
Fastest Return on Investment
PhytoMAX lights are the best value per watt among all commercial LED plant lights. They are proven to achieve an average return on investment of 6 to 12 months. This light pays for itself within a year.
Environmentally Friendly
This light does not contain the highly toxic mercury you find in all HID and fluorescent bulbs. This also means no fees for hazardous waste disposal.
Best Warranty in the Industry
Black Dog LEDs come with a 5-year warranty and a 90-day return policy. See the 'Delivery and Returns' tab above (above on desktop, below on mobile) for more details.
The Black Dog PhytoMax-3 Series includes is available in a wide range of options including: the PM-3 24SP, PM-3 20SP, PM-3 12SP, PM-3 16SP, PM-3 8SP, PM-3 4SP and the PM-3 2SP.
And for commercial facilities where certification tags are required please enquire about the Commercial Series - they're exactly the same as the Professional (P) but include Tags for about $20 extra.
Free Shipping | We offer Free Shipping over $100 |
![]() |
Most products ship within 1 to 3 business days from the date of your order (unless indicated on the product page). Some items take a bit longer to ship since they are built to order (i.e., Timber Grow Lights, ChilLED Tech, Trimmers, etc). We will send you tracking information as soon as it is available. |
|
![]() |
Returns are easy, simply contact us for a returns number and send your item to our returns centre for fast processing. We'll get you a replacement or refund in a snap! |
Every transaction at ShopGrowSpaces.com is guaranteed to be safe.
This site uses SSL encryption technology that so that you never have to worry about credit card safety.
Statistically online purchases are safer than using your credit card at a department store or a gas station. Experts have shown that online purchases are far safer than in person credit card transactions because the information is immediately encrypted into a scrambled message that can only be decrypted by an authorized computer.
Still don’t want to use your credit card on the World Wide Web?
We’ve got you covered! Simply call us at +1 (307)-284-3072 and we will gladly help you place your order.
We know you have a choice in online shopping, and we want to do all that we can do to earn your business. We not only want to earn it, but we want to keep it as well!.
Here are the top reasons to buy from ShopGrowSpaces.com Manufacturer Direct
As an online based store, we ship directly from our wholesaler warehouses, which means we can pass the savings directly to our customers.Lowest Prices Guaranteed
We work tirelessly to ensure we have the lowest prices in the online market for our range of products. We're that confident that we'll beat any competitor's price by 10%. Check out our Best Price Guarantee policy.Fast Dispatch
Orders are dispatched usually within 2 business days(post order processing & handling). You'll get an email confirmation of shipping with tracking ID when your order leaves our warehouse.Secure Payments
Our online store is Shopify-based with SSL Encryption on all our pages, content and data. This simply means you're always safe when shopping with us.12-24 Month Manufacturer's Warranty
All our products come with a 12-24 month manufacturer's warranty.Dedicated Customer Support
Our dedicated team of specialists are available 7 days a week to answer your queries. Talk to us by phone, email or live chat!
Please note that shipping charges includes delivery to the front of your house only. Please consider planning ahead if the items you order are heavy/large to get them to their desired location.
We work very hard to ensure that we offer the absolute best prices online. If you find another online store that offers a lower price then us within 30 days of your purchase date please let us know and we will refund your original payment for the difference. We want you to feel confident that you are getting the absolute best price for the product you are ordering. If you find that our own website has a lower price for the same item you have ordered within 30 days of your purchase date will refund the difference as well.
To request your partial refund, simply e-mail us a link to the same product on our website, or on our competitor's website, within 30 days from the date of your order and we will process the credit accordingly.
Our 100% Price Guarantee has some limitations:
- You must purchase the item from our website before requesting your Price Match Guarantee
- Promotions such as rebates and "buy one, get one free" offers are not eligible
- The item must be in stock on the competitor's website
- The competitor must be an online store, they may not have a retail location
- The website can not be a discounter or auction website (ie; eBay, overstock, Walmart, Amazon, etc..)
- The competitor must be an Authorized Retailer of the product in question
- The Price Match Guarantee includes the item price and the shipping charges, it excludes sales tax
LOWEST PRICE GUARANTEE TERMS:
CLAIM
You will be required to provide the following information:
-
Proof of guarantee:
Your Shopping Guarantee number and your email address used during the eligible transaction. The Shopping Guarantee number is provided to you on the order confirmation page from your merchant or the Certificate of Guarantee email. -
Details about the transaction:
Web site where the eligible purchase was made, date of purchase, amount paid, description of the item and SKU (if applicable). This information is typically included in the purchase confirmation email you received from the merchant. -
Proof of lower price:
We recommend that you send us a screenshot and the URL of the same item you purchased, showing the new price. We cannot accept printed materials, or email text as proof of the lower price.
All claims must be made by sending an email to PriceClaim@NortonShoppingGuarantee.com. Our staff will verify your claim within 10 business days. We reserve the right to contact you and the merchant in order to get more information. All claims must be made in English.
SERVICE CONDITIONS AND LIMITATIONS
- You must make a claim following the instructions above. We will review such claim for completeness and legitimacy, and, if approved, will make payment directly to you.
- Lowest Price Guarantee, when included with the Norton Shopping Guarantee you receive, is available only as follows:
- To be eligible, the value of a claim must be greater than $5 USD, but may not exceed $100 USD. per transaction. The maximum amount that you can claim in any 12-month period is $200 USD.
- The price reduction must be on the same item, with the same item SKU (if applicable), offered for sale on the same merchant's Web site, under the same merchant terms and conditions.
- For ticket purchases, such as sporting events, shows, concerts, etc., the price reduction must be for the same date and time, same show, same venue, and same quantity of tickets. Seats must be in the same section and in the same row or better.
- Lowest Price Guarantee does not apply to any of the following:
- Any item to which a volume discount, a coupon, a bundling arrangement (such as two-for-one), a customer rebate, an inventory liquidation, "Closeout Sale", "going out of business", "free offer", "CyberMonday", "Deal of the Day" promotion or other similar special promotional pricing mechanism is applied.
- Shipping, handling, taxes, surcharges, and any other similar fees.
- Any currency fluctuation. All claims will be reviewed in US dollar only as priced on the merchant's Website.
- Any partial, incomplete or cancelled orders, or any order for which a Purchase Guarantee claim has been submitted.
- One-of-a kind items (including antiques, artwork, rare coins and furs).
- Limited edition items.
- Services and additional costs (such as installation charges, extended or supplemental warranties, or memberships).
- Used, altered, rebuilt and refurbished items.
- Custom-built items.
- Land and buildings.
- Negotiable instruments (such as promissory notes, stamps and travelers checks).
- Items provided under a leasing arrangement.
- Cash or cash equivalent.
- Items that do not have a standard SKU will not be eligible for Price Guarantee.elec
Description
Black Dog just bested their best in terms of power with the brand new PhytoMAX-3 series.
The PhytoMAX-3 8S draws 410 watts and delivers 874 μmol/s total photobiological photon flux (PBF) making the series the most efficient grow lights on the market.
What that means for you is the largest coverage area on the market at 6.25 x 6.25 ft for Veg and 5 x 5 ft for Flower/Bloom and an even light across the footprint that penetrates deep below the canopy.
You can also expect to get +2.5 lbs or more of dried, cured and trimmed flower per light.
This is a truly full-spectrum (350-750nm, UV to NIR PBAR) LED plant grow light! The PhytoMAX-3 8S uses only the highest-quality, latest-technology, top-bin LEDs to deliver Black Dog LED's proprietary full-cycle Phyto-Genesis Spectrum® evenly over the entire footprint, with unprecedented PAR levels, canopy penetration and yields!
Recommended for full-cycle growth in spaces (and tents) from 3' x 3' to 5' x 5'
Your plants grow stronger and yield more.
With the larger coverage and higher yields, Black Dog lights pay for themselves within a year.
Black Dog PM-3 8S Quick Summary
- Exceptionally Yields up to 2.5+lbs or more per light!
- Daisy Chain Compatible - up to 20 amps on 1 outlet
- 224 LEDs — deep canopy penetration and even coverage
- True Wattage is 410W
- Maximum flowering space - 5' x 5' — largest usable coverage in the industry and grows more plants with one light
- Dimmable from 15% to 100%
- True full spectrum from UV to IR (280nm to 800nm). Ultraviolet - 3.4% UV (< 400nm)— perfectly tailored for plants' needs
- Pays for itself within a year due to more output at lower cost plus higher and better yields
- 5-year warranty and a 90-day return policy — removes purchasing risk
More Intense Light for Deeper Canopy Penetration
This fixture has 224 high-output 5-watt LEDs that deliver an intense light, which is necessary for deep canopy penetration. The light is delivered evenly throughout the coverage area, eliminating hot spots and leaf burn.
Highest Power LED Grow Light on the Market
The PhytoMAX-3 8SP at 410 actual watts and 874 μmol/s total photobiological photon flux (PBF), these grow lights are our most powerful grow lighting solution to date.
Largest Proven Footprint of any LED Grow Light
Independent spectroradiometer testing has proven that the PhytoMAX-3 8SP footprint is the largest on the market. At the same time, it achieves an evenly covered footprint, meaning no hot spots. You won't have to worry about leaf burn.
Industry's Best Heat Management Maximizes LED Life
This fixture is equipped with ultra-quiet fans that are rated for up to 70,000 hours of use and the largest heat sinks in the industry. Black Dog lights have the best active heat management of all LED lights.
Despite the insane power, this fixture only puts out 1398 BTU, which is not much more than a 700 watt HPS system. Keeping heat down is vital for maximizing the lifespan of LED diodes and for spectrum stability.
Most Efficient Spectrum for Growing Plants
Over 6 years of research and testing has resulted in Black Dog's Phyto-Genesis Spectrum™. It is a true full spectrum, with light ranging from UVA and UVB to far IR. In numbers, it covers wavelengths from 280 nm to 800 nm giving the PM-3 series a significantly wider range on the color spectrum than most grow lights.
This spectrum is ideal for all stages of plant growth. Using one spectrum throughout the grow cycle eliminates the growth stalling that occurs whenever you change the light spectrum mid-grow, such as switching from MH to HPS bulbs.
The Phyto-Genesis Spectrum™ targets photosynthetic (chlorophyll/carotenoid) peaks and also increases production of essential oils via the UV-A light. The inclusion of infrared light helps boost photosynthetic efficiency (see Emerson Effect).
In equal-wattage tests, this spectrum outperforms HPS bulbs, standard MH bulbs, light-emitting ceramic MH bulbs, induction bulbs, fluorescent bulbs and "white" LEDs.
Moreover, the Phyto-Genesis Spectrum appears white to the human eye, which means you can easily monitor plant health. If you've ever grown below a traditional pinkish LED light, you know how hard it can be to see problems and address them in time.
Fastest Return on Investment
PhytoMAX lights are the best value per watt among all commercial LED plant lights. They are proven to achieve an average return on investment of 6 to 12 months. This light pays for itself within a year.
Environmentally Friendly
This light does not contain the highly toxic mercury you find in all HID and fluorescent bulbs. This also means no fees for hazardous waste disposal.
Best Warranty in the Industry
Black Dog LEDs come with a 5-year warranty and a 90-day return policy. See the 'Delivery and Returns' tab above (above on desktop, below on mobile) for more details.
The Black Dog PhytoMax-3 Series includes is available in a wide range of options including: the PM-3 24SP, PM-3 20SP, PM-3 12SP, PM-3 16SP, PM-3 8SP, PM-3 4SP and the PM-3 2SP.
And for commercial facilities where certification tags are required please enquire about the Commercial Series - they're exactly the same as the Professional (P) but include Tags for about $20 extra.
Free Shipping
Free Shipping | We offer Free Shipping over $100 |
![]() |
Most products ship within 1 to 3 business days from the date of your order (unless indicated on the product page). Some items take a bit longer to ship since they are built to order (i.e., Timber Grow Lights, ChilLED Tech, Trimmers, etc). We will send you tracking information as soon as it is available. |
|
![]() |
Returns are easy, simply contact us for a returns number and send your item to our returns centre for fast processing. We'll get you a replacement or refund in a snap! |
Online Security
Every transaction at ShopGrowSpaces.com is guaranteed to be safe.
This site uses SSL encryption technology that so that you never have to worry about credit card safety.
Statistically online purchases are safer than using your credit card at a department store or a gas station. Experts have shown that online purchases are far safer than in person credit card transactions because the information is immediately encrypted into a scrambled message that can only be decrypted by an authorized computer.
Still don’t want to use your credit card on the World Wide Web?
We’ve got you covered! Simply call us at +1 (307)-284-3072 and we will gladly help you place your order.
Why Buy From Us
We know you have a choice in online shopping, and we want to do all that we can do to earn your business. We not only want to earn it, but we want to keep it as well!.
Here are the top reasons to buy from ShopGrowSpaces.com Manufacturer Direct
As an online based store, we ship directly from our wholesaler warehouses, which means we can pass the savings directly to our customers.Lowest Prices Guaranteed
We work tirelessly to ensure we have the lowest prices in the online market for our range of products. We're that confident that we'll beat any competitor's price by 10%. Check out our Best Price Guarantee policy.Fast Dispatch
Orders are dispatched usually within 2 business days(post order processing & handling). You'll get an email confirmation of shipping with tracking ID when your order leaves our warehouse.Secure Payments
Our online store is Shopify-based with SSL Encryption on all our pages, content and data. This simply means you're always safe when shopping with us.12-24 Month Manufacturer's Warranty
All our products come with a 12-24 month manufacturer's warranty.Dedicated Customer Support
Our dedicated team of specialists are available 7 days a week to answer your queries. Talk to us by phone, email or live chat!
Please note that shipping charges includes delivery to the front of your house only. Please consider planning ahead if the items you order are heavy/large to get them to their desired location.
Price Guarantee
We work very hard to ensure that we offer the absolute best prices online. If you find another online store that offers a lower price then us within 30 days of your purchase date please let us know and we will refund your original payment for the difference. We want you to feel confident that you are getting the absolute best price for the product you are ordering. If you find that our own website has a lower price for the same item you have ordered within 30 days of your purchase date will refund the difference as well.
To request your partial refund, simply e-mail us a link to the same product on our website, or on our competitor's website, within 30 days from the date of your order and we will process the credit accordingly.
Our 100% Price Guarantee has some limitations:
- You must purchase the item from our website before requesting your Price Match Guarantee
- Promotions such as rebates and "buy one, get one free" offers are not eligible
- The item must be in stock on the competitor's website
- The competitor must be an online store, they may not have a retail location
- The website can not be a discounter or auction website (ie; eBay, overstock, Walmart, Amazon, etc..)
- The competitor must be an Authorized Retailer of the product in question
- The Price Match Guarantee includes the item price and the shipping charges, it excludes sales tax
LOWEST PRICE GUARANTEE TERMS:
CLAIM
You will be required to provide the following information:
-
Proof of guarantee:
Your Shopping Guarantee number and your email address used during the eligible transaction. The Shopping Guarantee number is provided to you on the order confirmation page from your merchant or the Certificate of Guarantee email. -
Details about the transaction:
Web site where the eligible purchase was made, date of purchase, amount paid, description of the item and SKU (if applicable). This information is typically included in the purchase confirmation email you received from the merchant. -
Proof of lower price:
We recommend that you send us a screenshot and the URL of the same item you purchased, showing the new price. We cannot accept printed materials, or email text as proof of the lower price.
All claims must be made by sending an email to PriceClaim@NortonShoppingGuarantee.com. Our staff will verify your claim within 10 business days. We reserve the right to contact you and the merchant in order to get more information. All claims must be made in English.
SERVICE CONDITIONS AND LIMITATIONS
- You must make a claim following the instructions above. We will review such claim for completeness and legitimacy, and, if approved, will make payment directly to you.
- Lowest Price Guarantee, when included with the Norton Shopping Guarantee you receive, is available only as follows:
- To be eligible, the value of a claim must be greater than $5 USD, but may not exceed $100 USD. per transaction. The maximum amount that you can claim in any 12-month period is $200 USD.
- The price reduction must be on the same item, with the same item SKU (if applicable), offered for sale on the same merchant's Web site, under the same merchant terms and conditions.
- For ticket purchases, such as sporting events, shows, concerts, etc., the price reduction must be for the same date and time, same show, same venue, and same quantity of tickets. Seats must be in the same section and in the same row or better.
- Lowest Price Guarantee does not apply to any of the following:
- Any item to which a volume discount, a coupon, a bundling arrangement (such as two-for-one), a customer rebate, an inventory liquidation, "Closeout Sale", "going out of business", "free offer", "CyberMonday", "Deal of the Day" promotion or other similar special promotional pricing mechanism is applied.
- Shipping, handling, taxes, surcharges, and any other similar fees.
- Any currency fluctuation. All claims will be reviewed in US dollar only as priced on the merchant's Website.
- Any partial, incomplete or cancelled orders, or any order for which a Purchase Guarantee claim has been submitted.
- One-of-a kind items (including antiques, artwork, rare coins and furs).
- Limited edition items.
- Services and additional costs (such as installation charges, extended or supplemental warranties, or memberships).
- Used, altered, rebuilt and refurbished items.
- Custom-built items.
- Land and buildings.
- Negotiable instruments (such as promissory notes, stamps and travelers checks).
- Items provided under a leasing arrangement.
- Cash or cash equivalent.
- Items that do not have a standard SKU will not be eligible for Price Guarantee.elec
Customer questions & answers
Have a Question?
Be the first to ask a question about this.