Quote Originally Posted by Dyranty
That's one powerful CFL. I noticed most 125 watt's are rated for between 12,000 - 12,800 Lumens after googling it. But still that's alot.

I just might have to go get myself one.
It was an approximation based on a chart I found (should have saved it) stating that a CFL with a 5000K temperature can generate 111 pupil lumens per watt, so I multiplied it by 125 which gave 13875 lumens (someone 'splain to me the difference between lumens & pupil lumens?).

I calculated that for optimal growth my cab requires 15500 lumens. As you state, 12000 sounds more like it, so if I add up both CFL's, 12000 + 3000 I get 15000, so I'm still pretty close to optimal, if it's more like 12,800 then I'm actually exceeding optimal!

Temps settling near 31 Celsius...still acceptable but I'll really have to keep an eye on it an make sure it doesn't exceed 35C...