Check the luminaire specification:
Unified Glare Rate UGR ≤ 19
Color rendering Ra ≥ 80
When light uniformity (Uo) at task area is < 0.6 (minimum), occupants experience shadows and contrasts which can be disturbing during work.
When unified glare rating (UGR) of luminaire is >19 (maximum), occupants experience lighting as uncomfortable. This can cause eyestrain.
Step 3: Check state of installation