Lighting: How much does the IP65 waterproofing affect efficiency / PPFD?

Does anyone know how much light the waterproofing blocks, on LED lights?

Is it a lot, or just like a 1-2% difference?

I'm going to order 2 Kingbrite lights and wanted to get them with waterproofing.

(I turned my guest bathroom into my grow room, just in case pipe bursts, etc).

so many ways to waterproof these LEDS, you need to drill the sales guy

from wrapping saren to spraying WD40 its a con

so I go waterproof free and then damp proof my own

then again it might be cheaper just to replace the plumbing in the bathroom (claim the insurance)

good luck

It restricts light too much
I understand your concern but maybe just valve off the water to the bathroom