These bulbs produce a narrower, more concentrated beam of light than floodlight bulbs. As LEDs, they last longer, are more efficient, and produce less heat than other types of bulbs. They also withstand vibration and are shatter resistant. Brightness is measured in lumens; the higher the lumens, the brighter the bulb. Bulbs with a warm light appearance have yellow tones. Bulbs with a cool light appearance have white/blue tones and are good for inspecting. A bulb’s estimated yearly energy cost is based on 3 hours of usage per day at $0.11 per kWh.

PAR bulbs have narrow beam angles that provide more focused beams of light than other spotlights. A short length allows them to fit in small can fixtures without protruding.

Brightness is measured in lumens; the higher the lumens, the brighter the bulb. Color rendering index (CRI) is a measurement on a scale of 0-100 of how accurately the light from a bulb represents an object's true colors; the higher the number, the more natural the colors appear. Any CRI value over 80 will show colors true to life. Bulbs with a warm light appearance have yellow tones. Bulbs with a neutral light appearance are often used in workspaces. Bulbs with a cool or daylight appearance have white/blue tones and are good for inspecting. A bulb’s estimated yearly cost is based on 3 hours of usage per day at $0.11 per kWh.

LED bulbs last longer and are more efficient than fluorescent bulbs. They generate little heat and withstand vibration. Ballast bypass bulbs eliminate the need for a ballast so the socket must be wired directly to the power source.

Plastic-coated glass bulbs are shatter resistant; the coating retains glass shards if they break.

Replace the U-shaped fluorescent bulbs in your fixture or upgrade to LED. These bulbs are often used in 2'×2' ceiling lights. Select a light appearance to match your existing lighting. Bulbs with more than one light appearance have a switch which allows you to match other lights in the room.

LED bulbs last longer and are more efficient than fluorescent bulbs. They’re compatible with most instant-start electronic ballasts, or you can use them in sockets wired directly to the power source. Check if your ballast is compatible by selecting a part number and clicking product detail. These bulbs are made for T8 sockets, but can be used in T12 sockets that are wired directly to a power source.

Plastic-coated glass bulbs are shatter resistant. If the glass breaks, the coating keeps shards from falling.