Handpiece bulbs are now available in LED, Fiber Optic, Halogen, and even a few incandescent. Be sure to match bulbs to the exact match with your system. Don’t hesitate to contact the seller to ensure it’s what you are looking for. Branded dental bulbs are usually better, as manufacturers tend to purchase the very best to use with their equipment, ensuring optimum performance. Halogen bulbs are super bright. LED bulbs are the latest technology, popular due to the longevity experienced for this application. LED does not seem to be affected as much as other technologies by the continuous on and off requirements needed in the clinic.