The Zircon Warm Amber filters correct and warm up a range of different Color temperature white LED's. Longer life filter for fine correction of warm white LED. (Example: 3000K LED to 2700K) Note: Color Temperature shift varies with type of LED. Zircon Filters A new concept in LED filter design. Fine-tune your LEDs There's a reason why lighting designers are turning to Lee Filters Zircon filters for their LEDs. It's because they've been specifically designed to fine-tune the inconsistencies often associated with LED lighting, ensuring your LEDs give the same performance, time and time again. Longer Life Filters for LED LED lighting has many benefits, but one of its stumbling blocks is that its intensity can contribute to the fade times of standard lighting filters. In order to overcome this, the Lee Filters Research and Development team has developed a new way of producing filters that ensures they last longer when used with LED lights. In fact, Zircon Warm Amber filters have been shown to retain at least 80% of their effectiveness after as much as eight months of continuous use on LED downlighters. Heavyweight Substrate Not only are Zircon filters longer-lasting than their standard counterparts, they're sturdier, too. Manufactured using a 180-micron material, they are more than double the thickness of a normal lighting filter. This makes them more durable and easy-to-use.