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Why are IP ratings required for LED lighting?
When choosing light fixtures for a commercial or industrial building, the IP rating specification should reflect the necessary protection against the environmental conditions that the light fitting is likely to experience.

The first digit of the IP code (protection against touching of live parts & access of solid items/bodies) will primarily be used to refer to the level of dust/debris protection of the light source in the housing (e.g. - some industrial & factory environments will have very high level of particulates)

The second digit of the IP code (protection against the harmful ingress of liquids) will be used to prevent the possibility of internal short circuiting of the light wiring & ballast by liquid - this is a possibility due to on-site industrial processes emitting liquid sprays or even cleaning routines which utilise water jets etc.
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