Red Sea ReefLED 90 Diffuser

I've made a diffuser to block the overspill of light from the Redsea ReefLED 90 lights.

Added vent holes so the light can stay cool, just slides over the top.

It is quite long, if needed it can be shortened, let me know and I'll shorten it or add the f3d file. 

UPDATE - f3d file added