... Spectroradiometer is very tiny(diameter of globe is only 0.5M); the total weight is light(alumimum sphere ... be cutomized 9. 2 years replacement warranty. DIAφ0.5m,φ1.0m,φ1.5m,φ2.0m,φ3.0mOther ... Sphere Paint coating inside adopts pure barium sulfateParameterReflectance p≈0.8, variation of ρ(λ)<1.5% in the visible ... more smooth, longer life and more accurate than normal 0.5cm ,1m,1.2m.1.5m.2m diameter Lumen ...