CRI= Colour Rendering Index (colour rendering index Ra). Describes the quality of artificial light compared to daylight (Ra=100) . The higher the value is, the more natural the rendering of illuminated colours.
IP = Ingress Protection. Indicates the level of protection for the housing against external influences, in compliance with DIN EN 60529. The first figure describes protection against foreign bodies, the second figure describes protection against water. The higher the individual values are, the higher the respective protection level is.
direct - indirect
Luminous intensity distribution
Describes the spatial dispersion traits of a light source.