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i just harvested a few days ago,with shity results. i have a 65 watt cfl,2 42 watt cfls,and 1 circle 30 watt cfl all crammed in a 1.5deep,1.5wide,3 foot tall homemade grow box.i grew 2 plants and am probably only going to get maybe a half ounce all together.i thought that would be plenty of light in that amount of space,i vegged for 2 weeks and flowered for about65 days.someone help me please im doing everything right but its so wrong.
Well, here's the math:
Your area is 1.5ft by 1.5ft which is 18" x 18" (I use metric cm / m in Aus :hippy:)
Therefore: There is 144 square inches in a square foot.
18" x 18" = 324 sq. in.
324/144 = 2.25 sq. ft.
You have a space of 2.25 sq. ft.
So you want (for best results) 10,000 lumens give or take.Quote:
2000 lumens sq. ft./21500 lumens sq. m. = Absolute minimum for growth. You won't get much from this, especially after the plant has grown a bit. Not really enough to flower well.
3000 lumens sq. ft./32250 lumens sq. m. = Pretty Good growth. Enough light for the entire light cycle, although your yields may be lower.
4000 lumens sq. ft./43000 lumens sq. m. = Very good growth. Once you pass around 3500, growth rate and ability goes up fast.
Over 5000 lumens sq. ft./53750 lumens sq. m. = Optimal growth. Dense growth in all stages.
Look on the packet of which you bought the CFL's and see what LUMEN they provide and what KELVIN they are.Quote:
23w CFL = 1600 lumens = 69.6 lumens/watt
30w CFL = 2000 lumens = 66.7 lumens/watt
40w CFL = 2600 lumens = 66.3 lumens/watt
Watt's is just how much electricity the bulb uses, has nothing to do with growing.
Hope that helped :) :hippy:
P.S Vegging for 2 weeks instant a long time for the plants to build. You wont get a huge yield even at optimal performance.
hey thanks,your info really helped me out alot,but i have added up my lumens and i have 11,100 lumens so that should be ok for thats box and just 2 plants,but like you said i only vegged for 2 weeks because i hag to worry about height and all that shit,when they were finished they wasnt even 2 foot tall so maybe thats the prob..ill have to try them lights in my small closet with 2 or three plants so i can let em get bigger and hope like hell for a better yeild.so thanks alot for your input man it helped me out alot.