ENERGY SAVING HIGH OUTPUT: 10W, 140 Lumens. Voltage: 12V. EXCELLENT AND SAFE LIGHTING: High quality Eco-halogen. 360 omnidirectional beam angle. 2700K warm white, CRI 100, mercury-free. Instant On. Dimmable! WIDELY USED LIGHTING APPLICATIONS: Often used for accent lights, under cabinet puck light, chandeliers, wall sconces, closet floor lamps, table/desk lamps, track lighting and landscape lighting, RV, caravan, boats, yachts, etc. DURABLE & STANDARD SIZE: Diameter: 0.38" (0.95cm), Length: 1.19" (3.0cm), Base: G4 Bi-Pin (4mm or 0.16" apart), 0.7mm diameter (updated). Base, Shape & Dimensions Base: G4 2-pin Bi-Pin with 4mm distance Shape: T3 Tubular JC Diameter: 0.375 inches Length: 1.19 inches Please ensure the bulb base matches your light fixture. Lighting Specifications Wattage: 10 Watts Luminous Flux: 140 Lumens Voltage: 12 Volts AC or DC Beam Angle: 360 Material: Glass Color Rendering Index (CRI): 100 for vivid, enhanced colors Instant On. No mercury. Lifespan: 2000 hours (1.8 years with an average of 3 hours of use per day) CE and RoHS certified Pack of 10 Operation with Halogen Dimmers These halogen bulbs are dimmable using dimmers designed for incandescent and halogen bulbs. All incandescent and halogen bulbs are dimmable using traditional dimmers, as these dimmers simply adjust the voltage level for dimming. Dimming using only LED dimmers will result in incompatibility, as LED dimmers operate very differently. Please check the compatibility of your dimmer or light fixture before purchasing.