In the world of light bulbs, MR stands for Multifaceted reflector. In the past, this was a type of halogen bulb. However, with new technology, there are now MR bulbs available in LED bulbs too. This means you can get all the benefits of an MR bulb but still experience the energy savings of LED. One of the most common types of MR LED bulbs are the MR16 LED Bulbs, also known as GU5. These bulbs are available in high, medium and low output, as well as in dimmable and coloured versions. At LEDBulbs we supply a large range of MR16 LED bulbs by leading brands including Philips and Kosnic.