OK.
This may have been covered elsewhere, but here goes.
Use LEDs.
Red and Blue light is needed by plants (470nm & 630nm with minimum 30nm spectral "sidebands")
UV is also needed. Achievable using carcinogenic UV-D ccfls (stimulates stress but non sexual, achieved best results with cheese cycled 3W ccfl , 5 seconds every 30 seconds) and most importantly UV-B mini CCFLs, 11W should be enough for 4 plants (2-3W per plant)
Green not needed (maybe needed by the Red Bearding characteristics of certain photo-active enzymes on the flowers , but I dont think it will affect yield or effect too greatly)
Looking at the curves of most HPS 600 lights, you see a steep spike of light energy conversion at 530nm ("yellow colour" light, fairly useless light for a plant) - maybe 60-200W. I am sorry, it has been so long since I grew and put energy into this research, but LEDs DO work and they ARE selective, and productive too.
You need 30-60W per plant max with LED and not that much blue in the end finale, which is the least efficient converted anyway.
You can have a grow room lit from veg til bud with this. Sorry if this is appears a complete load of shite, it works and I mean it. Ruderalis mixed strains respond especially well comparatively if given poor light while you are experimenting with different models of diodes
This may have been covered elsewhere, but here goes.
Use LEDs.
Red and Blue light is needed by plants (470nm & 630nm with minimum 30nm spectral "sidebands")
UV is also needed. Achievable using carcinogenic UV-D ccfls (stimulates stress but non sexual, achieved best results with cheese cycled 3W ccfl , 5 seconds every 30 seconds) and most importantly UV-B mini CCFLs, 11W should be enough for 4 plants (2-3W per plant)
Green not needed (maybe needed by the Red Bearding characteristics of certain photo-active enzymes on the flowers , but I dont think it will affect yield or effect too greatly)
Looking at the curves of most HPS 600 lights, you see a steep spike of light energy conversion at 530nm ("yellow colour" light, fairly useless light for a plant) - maybe 60-200W. I am sorry, it has been so long since I grew and put energy into this research, but LEDs DO work and they ARE selective, and productive too.
You need 30-60W per plant max with LED and not that much blue in the end finale, which is the least efficient converted anyway.
You can have a grow room lit from veg til bud with this. Sorry if this is appears a complete load of shite, it works and I mean it. Ruderalis mixed strains respond especially well comparatively if given poor light while you are experimenting with different models of diodes