Quote Originally Posted by qdavid
Back to the question, I think you have to go by the number of lumens for an accurate comparison. I don't remember the numbers but I do know that an HPS has a much higher number of lumens per watt.
Huh? What does this have to do with his question? Like I said you cannot be sure unless you look at spec sheets or call the mfg or do a light meter test. That's why I was suggesting that you could just solve any issues about it by getting a $2 reflector. Just because someone says something one way or the other, without backing it up with something, that doesn't mean it's the correct answer.
Opie Yutts Reviewed by Opie Yutts on . CFL Light Intensity Question... Does anyone know the optimum positioning of a CFL. What I mean is, does a CFL's light intensity radiate parallel to the bulb (inline with the coil) or perpendicular to the coil. I don't know exactly how to explain my question, but I do not know if I should align my bulbs so that they point at my plants, downward vertically, or if they should be aligned so that they point outward, horizontally. Does anyone know ? Rating: 5