About Brightness
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About Light Appearance
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Screw-In Base Light Bulbs
Use these bulbs in standard sockets, panels, and appliances. 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 neutral light appearance are commonly used in workspaces. Bulbs with a cool or daylight 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.
Halogen bulbs are slightly more energy efficient than incandescent bulbs, but they generate more heat.
| Equiv. Incand. Bulb Wattage | Light Appearance | Brightness, lumens | Light Technology | Light Setting | Bulb Shape No. | Bulb Material | Color | Wattage | Rated Life, hrs. | Est. Yearly Energy Cost, $ | Each | |
Pointed Bulb—Miniature Candelabra Base (7/16" Dia.) | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
120V AC | ||||||||||||
| 100W | Warm (2,900K) | 1,700 | Halogen | Dimmable | T4 | Glass | Clear | 100W | 2,000 | 12.05 | 0000000 | 00000 |
| 150W | Warm (2,900K) | 2,800 | Halogen | Dimmable | T4 1/2 | Glass | Clear | 150W | 2,000 | 18.10 | 0000000 | 0000 |
120V AC/120V DC | ||||||||||||
| 250W | Warm (2,900K) | 4,200 | Halogen | Dimmable | T4 1/2 | Glass | Clear | 250W | 2,000 | 30.20 | 0000000 | 0000 |
| 500W | Warm (2,950K) | 10,450 | Halogen | Dimmable | T4 | Glass | Clear | 500W | 2,000 | 60.30 | 0000000 | 00000 |
Prefocus Base Light Bulbs
Small but powerful, these bulbs are commonly used in stage and security lighting. All have a neutral light appearance that is brighter than warm light. A bulb’s estimated yearly energy cost is based on 3 hours of usage per day at $0.11 per kWh. These halogen bulbs are slightly more energy efficient than incandescent bulbs, but they generate more heat.
Voltage | Wattage | Light Appearance | Brightness, lumens | Operating Position | Bulb Trade Number | Light Technology | Bulb Shape No. | Color | Rated Life, hrs. | Est. Yearly Energy Cost, $ | Bulb Dia. | O'all Lg. | Each | |
Single Contact—Medium Base (1 1/8" Dia.) | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Pointed Bulb | ||||||||||||||
| 120V AC/120V DC | 500W | Neutral (3,050K) | 11,000 | Base Down, Horizontal | BTL | Halogen | T6 | Clear | 500 | 60.22 | 3/4" | 5" | 0000000 | 000000 |
| 120V AC/120V DC | 500W | Neutral (3,200K) | 13,000 | Base Down, Horizontal | BTM | Halogen | T6 | Clear | 100 | 60.22 | 3/4" | 5" | 0000000 | 00000 |
| 120V AC/120V DC | 1,000W | Neutral (3,200K) | 28,500 | Base Down, Horizontal | BTR | Halogen | T7 | Clear | 250 | 120.45 | 7/8" | 5" | 0000000 | 00000 |
Recessed Single-Contact Base Light Bulbs
These slender bulbs are used in lamps and task lights. 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 neutral light appearance are commonly used in workspaces. A bulb’s estimated yearly energy cost is based on 3 hours of usage per day at $0.11 per kWh. These halogen bulbs are slightly more energy efficient than incandescent bulbs, but they generate more heat.
| Wattage | Light Appearance | Brightness, lumens | Operating Position | Bulb Trade Number | Light Technology | Bulb Shape No. | Color | Rated Life, hrs. | Est. Yearly Energy Cost, $ | Bulb Dia. | O'all Lg. | Pkg. Qty. | Pkg. | |
Tubular Bulb—1/4" Base Dia. | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
120V AC/120V DC | ||||||||||||||
| 1,000W | Neutral (3,200K) | 27,000 | Horizontal | 1000T4Q/CL, FCM | Halogen | T4 | Clear | 300 | 120.45 | 1/2" | 4 3/4" | 1 | 0000000 | 000000 |