optical
Luminous flux according to Bining : 800 lumens.
Colour temperature : 2700 K to 4000 K (2 at 3 Macadam step).
Service Range : 70 % of nominal flux after 50 000 hours.
Colour Rendering Index : CRI 90.
PMMA acrylic lens, efficiency ~90 %.
Available degrees : 15°, 25°, 40° & ELL.