Thanks, JAG, that would not be a bad deal if we get to that point.
Do you know if your program or the instrument allows one to make measurements in micromoles of photons per square meter per second or some equivalent measurement of photon flux. That is the sort of ‘gold standard’ for measurement for photosynthetically active radiation (PAR) from a grow light.
I’ll look for a reference for this.
Here is a guy doing quantitative measurment.
Ultimately, we would want to be able to not only get the ‘curve’ but do the quantitative measurement as they are doing. Once again, I’m getting way ahead of things here because we need to determine the LED wavelengths we want and then source them based on reliability, form factor, drive voltage, power and lumens per watt efficiency.
Ideally -
reliability - long life
form factor - the same or close enough so we could heat sink them all on the same heat sink
drive voltage - hope to use the same voltages and / or driver circuit(s)
power - higher better - I’d say 3W minimum and maybe 5 watt units (this is what the others do)
efficiency - optimize lumens per watt
viewing angle - need close to the same angular intensity distribution
These are just my own ideas. I’m not an expert on it and have never built one so feel free to comment with your own ideas.