And I was just throwing out the buzzword for the warm light coming from the original GI bulbs more than an actual part number for an exact color temperature matched LED... I currently don't use LEDs at all in my own machines... that is on the list of things to change soon. Whether to warm whites or sunlight, I would have to try them both and see which gives the best results in GI. It is smart to put colored LED’s in inserts , especially red under red inserts, yellow, under yellow, green under green... every wavelength NOT filtered out by the insert is less heat energy being forced into the plastic and reduces thermal aging and pigmentation or dye fading depending on which was used in the plastic. You might say that putting white LED’s under colored inserts looks better and they probably do, but then the insert is filtering out the unwanted wavelengths the white LED is generating which leads to long term degradation and fading that a colored LED would limit but not eliminate. Either way the heat is reduced dramatically and the degradation due to heat is the real enemy in this equation, but knowing their are some science types on here... a quick lesson in physics never killed anyone, only the proper application of the principles learned has.