optical
Luminous flux according to Bining: : 150 lumens by spot;
Colour temperature: : 2400K to 5000K;
Service Range: 70 % of nominal flux after 50 000 hours;
Colour Rendering Index: CRI 90.
PMMA acrylic lens, efficiency ~90 %;
Available degrees: 16°, 24°, 40° & ELL