50W 2800lm led ceiling panel light a, Super Thin: 13mm thickness b, High PF: over ... Efficiency: over 85% d, 2 year 50W 2800lm led ceiling panel light 1. Advantage: a, Super Thin: 13mm thickness b, High ... room, d, Local illumination of show room, art exbition, museum, office, readig room, corridor, toilet, e, Light of Jewelry and fashion ...