Sun to Fri 9am-7pm ET
Sun to Fri 9am-7pm ET
Grand Master lights deliver powerful grow lighting built for indoor growers who demand precision, durability, and high output. Known for their multi-channel spectrum control and water-resistant construction, these lights give you full control over your environment from seed to harvest.
For the best PAR consistency we have ever seen on a grow light with added diodes on the edges checkout GML's 4x4 and 5x5 tent grow lights.
Popular Grand Master lighting picks like the Tarantula Borg Evolution V2 and V3 offer intense full-spectrum coverage with Samsung EVO diodes and customizable tuning. Grandmaster LED lights' Tarantula Voyager packs the same top-tier performance with added versatility for various grow spaces. Expect unmatched consistency, rugged build, and proven results in every fixture.
Achieve consistent cloning success with waterproof, energy-efficient bars designed for vertical propagation. For professional cultivators and verti...
View full detailsFine-tune flowering and plant morphology precisely with warm-spectrum 2200K booster bars built to last. For serious cultivators looking to fine-tun...
View full detailsOptimize flowering with precise far-red 730nm booster bars for enhanced bloom response and stretch control. For growers looking to fine-tune flower...
View full detailsBoost bud density and flowering power efficiently with targeted deep red 660nm spectrum booster bars. For growers looking to optimize flowering and...
View full detailsEnhance vegetative growth with energy-efficient blue spectrum booster bars for tighter nodes and stronger roots. For growers looking to fine-tune v...
View full detailsBoost canopy penetration and spectral precision with ultra-efficient 10W light bars—built to scale, daisy-chain, and thrive in humid grow environme...
View full detailsSupport lush greens and seedlings with full-spectrum 24W bars that deliver consistent coverage, low heat, and high efficiency for indoor grow setup...
View full detailsGrow vibrant seedlings and veggies with full-spectrum 24W bars designed for consistent light, low energy draw, and humid indoor environments. For i...
View full detailsThese work great and being able to buy in bulk beats the heck out of Amazon pricing.
its ok i don't think its worth the money i only got 150 more par over a 600 watt 6 bar light
I mean, what can I say everything I’ve gotten from Rosineer is awesome so I mean really all I can say top-of-the-line I love it. I love it. You don’t have to hardly put anything on it. To press is so nice once again guys you knock it out of the park. I love it. I guess the only thing I can say is we wish you had your own filteris awesome so I mean really all I can say top-of-the-line I love it. I love it. You don’t have to hardly put anything on it. To press is so nice once again guys you knock it out of the park. I love it. I guess the only thing I can say is we wish you had your own filter bags that matches the block blocks and I have every size thank you so very much and fast shipping.
Came broken and missing pieces but the company was quick to send new foot pads and the missing pieces. Once the company sent correction it was still not possible to put it together as the bolts were not long enough to screw in and there were no instructions. There are two spaces for bolts to hold the leg piece on, the top opening has a drill out to let the bolt pass through and screw in fully, the one below does not, making the bolt too short to touch the body of the equipment.