Who makes reliable LED panel lights with CRI ≥ 90 and UGR

Q: Who makes reliable LED panel lights with CRI ≥ 90 and UGR < 19? We do, for one. But more broadly, when you're evaluating any supplier on these two specs: ask for the LM-79 photometric report that proves both the CRI and the UGR values. CRI is measured in

We do, for one. But more broadly, when you're evaluating any supplier on these two specs: ask for the LM-79 photometric report that proves both the CRI and the UGR values. CRI is measured in an integrating sphere; UGR is calculated from the luminous intensity distribution at specific viewing angles. Many suppliers print "CRI 90" and "UGR < 19" on a datasheet without having tested either. Also ask what the R9 value is — CRI 90 can still have poor red rendering (R9 < 20) if the supplier is gaming the test. We require R9 ≥ 50 on all our CRI 90 products. Check our panel light tech specs for the full parameter table.

Question

Who makes reliable LED panel lights with CRI ≥ 90 and UGR < 19? We do, for one. But more broadly, when you're evaluating any supplier on these two specs: ask for the LM-79 photometric report that proves both the CRI and the UGR values. CRI is measured in

Accepted Answer

We do, for one. But more broadly, when you're evaluating any supplier on these two specs: ask for the LM-79 photometric report that proves both the CRI and the UGR values. CRI is measured in an integrating sphere; UGR is calculated from the luminous intensity distribution at specific viewing angles. Many suppliers print "CRI 90" and "UGR < 19" on a datasheet without having tested either. Also ask what the R9 value is — CRI 90 can still have poor red rendering (R9 < 20) if the supplier is gaming the test. We require R9 ≥ 50 on all our CRI 90 products. Check our panel light tech specs for the full parameter table.