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 & the result is the Zircon. Manufactured using a 180-micron material they are more than twice the thickness of a standard gel & Zircon Warm Amber filters have been shown to retain at least 80% of their effectiveness after as much as eight months of continuous product use on LED downlighters where a standard filter can start to show fade after 30 hours.