3rd Grow - light height

[Zenocide]

Ok new seed popped within 16 hours and she's now planted and waiting to pop her head out to the light...

As you can see I am growing under CFLs, in fact there areally 3 x 26 watt CFLs and 1 x 25 watt UVB 10% 150 CFLwhich accelerates resin production, So over my first and 2nd grow I was tooing and froing about with the light height more than I would of liked to.

I was advised to keep CFLs within 6-9 inches away from the canopy of the plant which seemed reasonable however I found they needed daily adjusting.

My question is will the plant growth above the lights if they are kept at one position? With my 1st and 2nd grow I noticed both plants seemed a bit stretched out so I'm wondering if I moved the lights too far away which caused the stretch.

 

[big teej]

Nice clean setup. My advice....Keep those smaller cfls no more than 3 inches from the tops or sides of your plant. Preferably closer to 2 inches and that will minimize stretching. If they are too far away your small seedling can stretch and the small fragile stem can break.

 

[Ratzilla]

My opinion about CFL light height is that they should be within 2-4 inches above the canopy.
I have never used a UVB bulb but I think they put out more heat so should be a bit further away.
I mean with any bulb its all about how much heat they put out.
So adjust accordingly.
Ratz

 

[big teej]

Also a tiny fan lightly blowing some air towards the lights will help you get even closer, just try not to let them touch. I left my pepper sprouts alone for a week and they actually grew onto the cfls. The fan will also strengthen the stem.