Have you watched the YouTube phone meter and quantum comparisons?
I seen the one after this post by an Irish lad using a $30 meter and a 0.028 or so conversion rate from the expensive meter, that's the one?.
I use this one and it gets it done. Divide by 67-69 depending on your COBs kelvin temperature. Not sure about the CMH as I use COBs and QBs, probably close enough. I really like this meter for helping me position my lights depending on the plant's life stage.
This seems to tie in to the above. Tell me though, how are you to know what kelvin temp the cobs are? (does the driver say this?). I know that I have some that lean into the blue and some that lean into the red. Would you expect the units that lean into the blue would have a lower or higher reading?. they were pre made and I've had them a good few year so I forget the exact kelvin ratings.
I have 6 units that all have two led chips each. The units are 200W each. I wonder how would the light reader do in this overlap situation of differing spectrums?. Could I get the high/low values and then split in-between as the end value?.
All I am really wanting to do is get a feel for the par per square foot figures so I know for sure how low/high the lights should be within a few inches. I am trying to dial in ppm/rh values and thinking that my ''intuition'' is not good enough to do it by sight.
