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So if you have the lights 4 inches to the plants you get 16 time for lights to the top canopy, and an average of more than double for sure.

Well, That is our experience with some growers, though quite limited. 300W is giving our close to 150,000 lumen and more umol than the Gavita DE, but if you need more lights, put them closer to your plant. When you shorten the distance by half your plants get 4 time more lights. Our tubes is...

Right now we use the T8 tube format, like the fluorescent tubes. our efficiency is at least 2 folds more than the competition, so I think a 240-280 should do the job. The biggest advantage is that our lights don't generate much light at all, so you can place the lights very close to the...

Graphene grow lights are now available, in blue, red and white (full spectrum).

We have a T8 graphene tubes already, in blue, red and white (full spectrum).