It is popular in the following equipment: instrument bulb, flashlight, microscopes, lamps, amusement equipment. Light emission type: projector. DC Bulbs: "+" button on the "-" side. DC Mini E10 bulbs. Power: 0.5 W. Brightness: 40 lm Choice of warm white or cool white Easy to install Product < p>Good quality and durable material Power: 0.5W Brightness: 50-60 Lm Working temperature: -30C+ 85C. E10 5LED lights work for vintage flashlight, Christmas tree, device indicator, physical test, cabin, etc. < p>Package included: 10 x 5LED E10 lamps NOTE: Bulbs can't be mixed, only one color and voltage in one package. If you need different colors or voltages, you must order different colors or voltages. The working voltage cannot be higher than the voltage of the bulb. (For example, if you buy a 6V cold white bulb for a 9V power supply, the bulb will burn out very quickly. But it will not burn out when it is used with 5V power supply, and the brightness will be darker than 6V). 3-10V voltage cannot light 12V and 24V bulbs. Choose the bulb which you need You can choose 9V. This is E10 lamp, only for E10 base Length: 29MM Diameter of the lamp holder: 10MM Length of the lamp holder: 14MM This is a DC E10 lamp The bottom is positive. < p>The side is negative. The bulb will not light up if connected incorrectly.