The 819 Zircon Cool Blue 8 Filter from LEE Filters can be applied over a warm white LED lighting fixture. While in use, this filter can correct the lighting fixture's output with a slight cooling effect and a mired shift value of -43.
Under 3000K light, the 819 Zircon Cool Blue 8 Filter exhibits a 0.18 density and transmits light at 65.5%. This filter is constructed from 180-micron polyester that resists fading from LED light fixtures and is delivered as a 24 x 24" sheet. Depending on the specific LED lighting fixture the 819 Zircon Cool Blue 8 Filter is used with, the precise color temperature shift may vary.