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.