This energy efficient LED MR16 spotlight light bulb is a high-quality, professional replacement for outdated 50W halogen spotlights, offering the same brightness, but using only a fraction of the energy.The light bulb emits a bright 621 lumens of warm white light, with a narrow 36 beam angle 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. The GU5.3 base 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 MR16 spotlight lamp is fitted with a low voltage 12V GU5.3 2-pin (5.33mm apart) base.This MR16 Spotlight is a newer product from Osram and supercedes their old MR16 Spotlight part codes: 4058075449466.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 MR16 Spotlight light bulb before purchase.To find the answers to some common questions about LED dimming, please read our guide Dimming for Dummies.