MichiganMedGrower
Well-Known Member
Yes I know the numbers but I wanted to see how much spectrum counts for myself.Yea spectrum is important in my opinion , i really like the 4200k bulb its really nice for seeing stuff under it and the plants seem to be growing beastly under it. 600w hps produces nearly 3x more lumens than those hortilux blue mh bulbs, i don't use hortilux mh bulbs anymore, they don't produce enough lumens for me to spend that kind of money on them, i got these el cheapo bulbs that produce like 2x more lumens (both MH) with a slightly less desirable spectrum. The 600w MH bulb i use produces 60k lumens vs 39k for the hortilux. A 600w HPS bulb produces 90k lumens so it's almost 3x more than that hortilux mh bulb, that could be why the weight + density wasn't good under that bulb. I like those hortilux mh bulbs for veg only.
And in every test for yield and density lumens always win. It's because plants transfer photosynthesis to the strongest wavelength regardless.
The full spectrum crowd doesn't want to believe this. But the university of Michigan has proven it time and time again.
But I still had to see. And the blue does seem to frost up the stuff a little more like the cmh.
Also I am using the 600w blue. The 400 has a better spectrum. The 600 is speced like an hps conversion bulb and does not have the same smooth curve. Or the same amount of uv if my tinting eye glasses are right. Way darker under the 400 blue.