Rebaydo 2pcs E10 Screw LED Bulb Short Round 6V to 12V DC. Works negative ground only. To make this bulb illuminate you connect +12 volts to the center contact and ground to the E10 threads on the side. Operates from 6 to 12 volts. Up to 7 Lumen output. Available in White 6000K, Red, Yellow/Amber, Green, Blue, Ultra Violet and RGB Red/Green/Blue. If the color is not shown we are out of stock of that color and it will take about 4 to 8 weeks to restock that color. The viewing angle is 120 degrees. The bulb is dimmable with a variable voltage supply such as your dashboard dimmer switch. Comparable to a 4 to 9 Watt incandescent bulb. The approximate size is 0.92" x 0.39". The E10 screw base is 10 mm diameter. Long life up to 30,000 hours. The White 6000K color uses about 19 mA at 12.04 volts. The approximate dimmable range of White 6000K color is from 3.5 to 12.00 volts. The red color uses about 19 mA at 12.04 volts. The approximate dimmable range of the Red color is from 3.5 to 12.00 volts. The Yellow/Amber color uses about 19 mA at 12.04 volts. The approximate dimmable range of the Yellow/Amber color is from 3.5 to 12.00 volts. The Green color uses about 25 mA at 12.05 volts. The approximate dimmable range of the Green color is from 3.00 to 12.00 volts. The Blue color uses about 23 mA at 12.05 volts. The approximate dimmable range of the Blue color is from 3.5 to 12.00 volts. The Ultra Violet color uses about 23 mA at 12.05 volts. The approximate dimmable range of the Ultra Violet color is from 5.50 to 12.00 volts. The RGB color uses about 18 mA at 12.05 volts. The approximate dimmable range of the RGB color is from 3.5 to 12.00 volts. These LED bulbs do not have built in load equalizers and may require load equalizers to be installed. Every bulb is tested before shipping. Includes 2 bulbs per package. 1 year warranty from date of purchase. CE and Rohs.