BloodShot420
Well-Known Member
yeah, 20" is about as good as the fluoro tubes are good for...
the cfl's in a reflector can reach a good distance and still keep the uv index at 2... which is not much - but its some UV compared to using HPS and uv blocking glass...
thats why i want some 20w T8s on each side of my reflector, i always keep that within 20" of the canopy...
the only negative things i can imagine about using the uv producing HID are
1 how do you know how much uvb is really being put out?
2 its not really the right color for flowering... it may not matter, but it could stress the plant in its final week...
3 you cant stop the uv, so any time spent in your grow room could have more exposure to uv than the beach...
*if you wanted accurate results, you'd need 2 washing machines, both identical, and you would put one plant in each![Wink ;-) ;-)](/styles/smilies/icon_wink.gif)
the cfl's in a reflector can reach a good distance and still keep the uv index at 2... which is not much - but its some UV compared to using HPS and uv blocking glass...
thats why i want some 20w T8s on each side of my reflector, i always keep that within 20" of the canopy...
the only negative things i can imagine about using the uv producing HID are
1 how do you know how much uvb is really being put out?
2 its not really the right color for flowering... it may not matter, but it could stress the plant in its final week...
3 you cant stop the uv, so any time spent in your grow room could have more exposure to uv than the beach...
*if you wanted accurate results, you'd need 2 washing machines, both identical, and you would put one plant in each
![Wink ;-) ;-)](/styles/smilies/icon_wink.gif)