flourescent for vegatative stage followed by hps for flowering

[bib fortuna]

flours/ by type

these are not exact numbers but is what i can remember off the top of my head, after looking at soooo many types of cfl's, hps's, and flours.

t12-60-70 lumens a watt
t8- 65-75 lumens per watt
t5-70-80 lumens per watt
t5 ho- 92-100 lumens per watt.

while mh bulbs are 120-140lumens per watt
and hps bulbs are 140-150lumens per watt.

and what i was refering to is that 20 1000 watt hps, is enough to have a garden that is enough lights to cover a 150'x150' ROOM. You will have to watch out for Light burn, as if you setup your lights wrong, some will get to much light. Adding co2 to your setup would help alot with this problem but will not solve it. Not to mention that to add co2 to a space this big would costs some serious $$$$

thanks. and sorry if i bit your head off earlier. the room is 50 x 60 or so.. maybe 50 x 70. I sort of thought 20 would be too much in there too but i havent taken measurements yet.

bib fortuna Reviewed by bib fortuna on 07-19-2007. flourescent for vegatative stage followed by hps for flowering would there be a big problem running flourescent lights for your vegatation stages and then switching to hps for your 12/12 cycle? im trying to find a way to not kill my electric bill. i havent really heard of anyone doing this but a friend suggested it would be a good way to get around a big grow. lets say 400 plants in 2 20x20 grow spaces. they would be light-isolated from eachother during the flowering stages. you would be 24 hours on during veggie stage for all 400 under the flourecsents Rating: 5