This energy efficient LED MR11 spotlight light bulb is a high-quality, professional replacement for outdated 20W halogen spotlights, offering the same brightness, but using only a fraction of the energy.The light bulb emits a bright 184 lumens of warm white light, with a narrow 36 beam angle and CRi >90 that\'s perfect for highlighting products in retail displays, or in galleries and other display lighting. It is also dimmable, giving you even more control over your lighting.The light bulb\'s long 25,000 hour lifespan means that once installed, it will not need replacing again for years. It also retrofits to existing light fixtures, so installing it is simply a case of swapping out the old light bulb for the new.As this is a low voltage light bulb, it will need to be fitted with a compatible driver or transformer when installed on mains circuits. See the manufacturer\'s website for more information.This LED MR11 spotlight lamp is fitted with a low voltage 12V GU4 2-pin (4mm apart) base.For indoor use only.This MR11 Spotlight is a newer product from Osram and supercedes their old MR11 Spotlight part codes: 4058075263925.Please note that theis 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.Please visit the manufacturer\'s website for up-to-date dimmer switch compatibility lists for this Osram LED MR11 Spotlight light bulb before purchase.To find the answers to some common questions about LED dimming, please read our guide Dimming for Dummies.