G9 LED light bulbs, 31mm diameter ball with clear cover. 3.5 watts with 48 pcs 3528 SMD power LEDs, As 20 watts Halogen bulb replacements,  90% more efficient than xenon bulbs, incandescent bulbs and Halogen bulbs traditional lighting, Lifespan of up to 60,000 hours means that equates to 20 years lifetime if turn on lamp 8 hours a day. These bulbs are perfect for the inside case lighting for jewelry,  no heat and good lighting.