XHL ( Xenon Halogen ) bulbs provide optimal brightness, ideal color temperature, and extended bulb life (up to 50% longer life). Twist Lock (TL) is compatible with other manufacturers' instruments. Positive Lock (AV) is exclusively for Heine connector models. Make sure to check which connector system your instrument head has before ordering.
Please note: Heine products are not available to purchasers outside of the U.S.A.