Color Temperature Filter Kit. Color temperature filters can be used with the Cyclops XLT-125 headlight system. The XLT-125 headlight illumination color temperature is 6100 degrees Kelvin and each filter in this kit reduces color temperature by 500 degrees Kelvin. Lower color temperatures appear more "yellowish" or similar to Halogen illumination. Certain types of anatomy become more visible at different color temperatures. We suggest you try all filters to see which performs best. The kit includes one (1) filter of each: 5500, 5000, 4500, 4000 and 3500 degrees Kelvin.