I actually saw a photometer the other day, first time I had seen one.

It was a two or 3 in one, Ph, mositure, photometer, I dunno, one of those crap meters that I have wasted so much $ on...

It did not measure in Lumens however, I do not believe. It went from 0 to 2,000 or something like that, likely candle power like yours, yeah?

By the way, midday, summer sun is around 10,000 lumens per square foot.

You HPS can match that or even top it if your grow area is compact enough.

Peace dawg and keep us updated on yo grow... *coughs* grow log! *coughs*
melodious fellow Reviewed by melodious fellow on . how to measure light yes you got it another noob(also know as stumps where i come from) question. i have a light meter but it is only rated in candle power anyone have a formula for converting this so i can kinda get an idea of how much more light i need im using a 125 w hps light now for veg. just wondering if someone had a link to something that could help out. thanks in advance! speedy Rating: 5