LE 4W Dimmable MR16 GU10 LED Bulbs, Pack of 10 Pack of 10 units.Dimmable. Energy Saving. Replace 35W halogen bulb by 4W LED. Save over 85% energy Dimmable. Works with most of dimmers but to ensure flicker free dimming, please use with silicon-controlled rectifier(SRC) type dimmer Easy Installation. Standard MR16 shape with GU10 base. Can be easily fitted instead of ordinary MR16 halogen bulbs. Eco-Friendly. No lead or mercury