Often used as status indicators, in displays, or to check circuit function in prototyping and testing, these bulbs have wire terminals to directly install onto circuit boards. As LEDs, they last longer, are more efficient, and produce less heat than other types of bulbs. Vibration won’t cause these bulbs to malfunction. Brightness is measured in lumens; the higher the lumens, the brighter the bulb. They require a resistor (sold separately) to limit current.

Turn standard light bulb sockets into standalone floodlight fixtures using these bulbs, which have an aluminum reflector to focus light downward and add a finished look. Rated for use in damp locations, they withstand humidity and moisture. Brightness is measured in lumens; the higher the lumens, the brighter the bulb. These bulbs have a cool light appearance, which is good for inspecting because it highlights white and blue tones. A bulb’s estimated yearly energy cost is based on 3 hours of usage per day at $0.11 per kWh.