For its light source, the luminaire uses only high-efficiency LEDs with CRI > 80 and selected color temperatures of 3000 K, 3500 K, and 4000 K. We use the latest generation of long life, up to 40,000 hour LEDs at 90 % lumen maintenance (L 90) with high-performance e LEDs with 3.8 W/ft, e² with 5.5 W/ft or e²+ with 7.5 W/ft.