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Give them a few more days, they should begin to shoot up soon.

The two main reasons for good ventilation is to keep a supply of CO2 and to regulate humidity to stop mould developing on your buds. Plants do not need CO2 when the lights are off, so during vegging you don't need ventilation at night. Vegging plants also grow well with higher humidity levels...

I don't know about temps, but I heard that high humidity will kill them. Apparently they swell up and burst. If you've got thick buds then be careful that the humidity doesn't cause mould to develop

Hi. Yeah that's a lot of light, how big is your grow area?

hi :) cfls and tubes work great, you can place them almost touching plants which makes them very efficient lumen-wise for smaller plants. MH give off a lot of heat so they can't be placed as close but they are much more efficient, putting out more lumens per watt than cfls and tubes. This page...

Hi. You should use daylight/cool-white bulbs for vegging. The ideal colour temperature for veg is 2700K. You have about 2x4 feet of room to grow, so 8 square feet. You should have at least 3000 lumens per square foot of growth, that means you need about 24000 lumens. 27watt CFLs give out about...