My wife has tinkered 6 lamps. Unfortunately, the parts are not very resistant to heat so we had to rely on LED. We tried 4 different manufacturers. These lamps are really the only ones in which we could not notice any difference to a halogen lamp. For comparison, I had the LED built right next to 2 halogen lamps, .... nothing to see, not reddish, flickering or other light color. We can recommend these bulbs in every case.