... System Specifications:• Diameter: IS-0.3M (φ0.3m),IS-0.5M (φ0.5m),IS-1.0M (φ1.0m),IS-1.5M (φ1.5m),IS-1.75M (φ1.75m),IS-2.0M (φ2 ... diffuse reflection: Reflectanceρ≈0.8 and accuracy of ρ(λ)<1.5%.• Build-in lighting holder position: The vertical is for E40, E27 and so ... 1,999 lm.• IS-1.0M is suitable for CFL or LED bulbs. The flux testing range is 0.1 to 199,990 lm.• IS-1.5M/IS-1.75M is ...