This low voltage MR11 from Osram is designed to be a high-quality, professional LED replacement for older 20W halogen bulbs. It offers a bright 184 lumens of warm white light, and its focused 36 beam angle makes it ideal for museums, galleries, shop windows and display cabinets. It is also dimmable, giving you even more control over your lighting setup.The LED spotlight offers all the brightness of the halogen bulbs it replaces, but uses only a fraction of the energy. With a superior lifespan of 25,000 hours, it will be years before this bulb needs replacing again.The two-pin GU4 base also retrofits to existing light fixtures, making it easy to swap out your old bulbs. Please note, as this is a low voltage bulb (12V), it needs to be fitted with a compatible low voltage driver/transformer when installed on a mains circuit. Please see the manufacturer's website for more details.2.8W LED MR11 spotlight20W halogen alternative184 lumens2700K warm white36 beam angle25,000 hour average rated life100,000 switching cyclesDimensions: D35mm x L38mmPlease note that this light bulb will operate with most AC and DC 12V transformers. However, some 12V transformers may have a minimum required load which may not be met when installing low powered LEDs: these drivers may cause flickering or the LEDs not to function correctly. If this issue arises it may be necessary to source a suitable LED driver. Please refer to the manufacturers website for compatibility.