This LED MR11 spotlight (GU4) light bulb has a low energy consumption of just 4W making it an ideal retrofit replacement.With a colour temperature of 4000K cool white and outputting 290 useful lumens, this LED alternative is equivalent to the brightness of a 35W halogen spotlight bulb.Non-dimmable. 36 beam angle creates a bright, focused beam of light that can be used anywhere.This spotlight lamp is fitted with a low voltage 12V GU4 2-pin (4mm apart) base.Please 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.