Looking for a Hue starter kit and confused by the different bulb types? Not sure if your lamps are compatible with E26, GU10, or B22? This guide will clear that up real fast! Let’s look at what Wikipedia has to say about each of these.
White E26 (left), GU10 (center), B22 (right)
E26 - Standard US bulb
The A-series light bulb is the “classic” type of light bulb that has been the most commonly used type for general-purpose lighting applications since the early 20th century. It has a pear-like shape and an Edison screw base.
GU10 - Track / directional lighting
Get the GU10 Starter Kit
A multifaceted reflector (often abbreviated MR) light bulb is a reflector housing format for halogen as well as some LED and fluorescent lamps. MR lamps were originally designed for use in slide projectors, but see use in residential lighting and retail lighting as well. They are suited to applications that require directional lighting such as track lighting, recessed ceiling lights, desk lamps, pendant fixtures, landscape lighting, retail display lighting, and bicycle headlights.
GU10 is a bi-pin connector designation. A common derivative of the MR housing is GU10 (G for glass) which is a lamp cap fitting format created by Havells Sylvania in 1997. GU10 is distinguished from the MR lamps by the U-shaped ceramic base mount with a 10 mm (pin center-to-center distance) 2-pin bayonet mount and operating under mains voltage rather than lower voltage.
B22 - Standard UK bulb
Get the B22 Starter Kit
The bayonet light bulb mount is the standard fitting in many former members of the British Empire including the United Kingdom, Australia, India, Ireland, and New Zealand, as well as parts of the Middle East and Africa (although not Canada, which primarily uses Edison screw sockets along with the United States and Mexico).