The lee zircon led filter pack has been designed specifically for use with led lighting one of the issues with this form of lighting is that despite running at low temperatures the intensity of the light can cause standard colour gels to fade quickly to combat this lee have developed a new way of producing filters and the result is the zircon manufactured using a 180 micron material they are more than twice the thickness of a standard gel and zircon warm amber filters have been shown to ret