Are Gu4 and Mr11 the Same

GU4 Bulbs are the base for the MR11 Bulb shape. … The MR11/GU4 is a spotlight style bulb measuring 33mm in diameter. Since GU4 LED Bulbs operate at 12 volts, they’ll need a transformer to ensure they function correctly.

What is a GU4 base?

GU4 Base Light Bulbs & Lamps The GU4 bulb is an MR11 dichroic push and fit lamp with 2 pins measuring 4mm apart. GU4 bulb base types are ideal for open fittings and as display lighting.

Will MR11 fit MR16?

For example, the MR11 is 11/8 inches, while the MR16 is 16/8 inches wide. It might not seem like a huge difference but try fitting an MR16 bulb into a track or recessed ceiling light specifically designed for a MR11 bulb and result is most likely going to end in a struggle.