dont spend 40$ for a bulb..your only doing pc box grow..use normal household cfls..23w bulbs here in ireland are staying under 4euro so im quit sure its pretty much same down in states..i dont know your measurments but 23w 6500k gives out around 1000-1100 lumens and 20w 2700k gives around 1150-1300lumens depends of the make..
if you have a thread here with your growbox displayd with measurments just give me a link and ill tell you whats the cheapest bulbs you can use to get max yeld..
Dexter007 Reviewed by Dexter007 on . Can i use a red spec cfl bulb for vegatative growth? Hey all just about to buy myself a £40 red spec bulb for a cfl stealth grow and i dont really feel like spending another £40 on a blue spec bulb, so i was wondering if i use red spec all through the growth of an autoflowering plant would that affect the plant? If so how much and in what way? Many thanks in advance Rating: 5