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About Brightness and Light Appearance
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Find the right lumen level to brighten your space. Then, compare the way warm, neutral, and cool lighting affect the appearance of everyday objects.
Dual-Filament Wedge-Base Miniature Light Bulbs
 |  |  |
Tubular | Tapered | Wide Wedge Base |
Often used in taillights and brake lights. These bulbs have two filaments that operate at different brightness levels, with the second filament shining brighter when activated. Brightness is measured in lumens; the higher the lumens, the brighter the bulb.
Light | Bulb | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Bulb Trade No. | Voltage | Wattage | Brightness | Tech. | Intensity Setting | Rated Life | Overall Lg. | Color | Material | Dia. | Shape No. | Pkg. Qty. | Pkg. | |||
Wide Base (0.63" Wd.) | ||||||||||||||||
Tubular Bulb | ||||||||||||||||
| 7443NA | 12V AC | 5 W 21 W | 21 lm 280 lm | Incandescent | 2 Way | 1,000 hr. 500 hr. | 1.87" | Amber | Glass | 0.83" | T6 1/2 | 1 | 1505K239 | 00000 | ||
Tapered Bulb | ||||||||||||||||
| 3157NA | 14V AC 12.8V AC | 8.26 W 26.88 W | 28 lm 302 lm | Incandescent | 2 Way | 5,000 hr. 1,200 hr. | 2.09" | Amber | Glass | 1" | S8 | 10 | 9527T336 | 00000 | ||
| 3157NALL | 14V AC 12.8V AC | 8.26 W 26.88 W | 28 lm 302 lm | Incandescent | 2 Way | 10,000 hr. 2,000 hr. | 2.09" | Amber | Glass | 1" | S8 | 10 | 9527T337 | 00000 | ||
| 4157NALL | 14V AC 12.8V AC | 8.26 W 28.54 W | 25 lm 302 lm | Incandescent | 2 Way | 10,000 hr. 4,000 hr. | 2.09" | Amber | Glass | 1" | S8 | 10 | 9527T552 | 00000 | ||
Bayonet-Base Status-Indicating Light Bulbs
 |
Use these as replacement bulbs in stack lights. Brightness is measured in lumens; the higher the lumens, the brighter the bulb. A bulb’s estimated yearly cost is based on 3 hours of usage per day at $0.11 per kWh.
Bulb | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Wattage, W | Bulb Trade No. | Light Technology | Material | Dia. | Shape No. | Rated Life, hr. | Est. Yearly Energy Cost | Overall Lg. | Color | Each | |||
Double Contact—Small Bayonet Base (0.59" Dia.) | |||||||||||||
24V DC | |||||||||||||
| 0.676 | 3S6, 6S6 | LED | Plastic | 5/8" | T4 1/2 | 100,000 | $0.08 | 1 13/16" | Amber | 6575T72 | 000000 | ||
Wedge-Base Miniature Light Bulbs
 |  |
Tubular Bulb | Medium Wedge Base |
Often used in automotive dashboards, instrument panels, appliances, and indicators. A flat, pinched base presses directly into the socket to hold these bulbs in place. Brightness is measured in lumens; the higher the lumens, the brighter the bulb.
Bulb | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Bulb Trade No. | Voltage, V DC | Wattage | Brightness | Light Technology | Rated Life | Color | Overall Lg. | Dia. | Material | Shape No. | Pkg. Qty. | Pkg. | |||
Medium Base (0.37" Wd.) | |||||||||||||||
Tubular Bulb | |||||||||||||||
| 194A | 14 | 3.8 W | 25 lm | Incandescent | Not Rated | Amber | 1.06" | 0.41" | Glass | T3 1/4 | 10 | 9527T406 | 00000 | ||
| 194NA | 14 | 3.8 W | 25 lm | Incandescent | Not Rated | Amber | 1.06" | 0.41" | Glass | T3 1/4 | 10 | 9527T404 | 0000 | ||
| 2825A | 12 | 4.8 W | 50 lm | Incandescent | Not Rated | Amber | 1.03" | 0.41" | Glass | T3 1/4 | 10 | 9527T199 | 0000 | ||
Index-Base Miniature Light Bulbs
 |  |
Side View | Tapered Bulb (Front View) |
Often used in taillights, brake lights, indicators, and other vehicle lights. These bulbs have two filaments that operate at different brightness levels, with the second filament shining brighter when activated. They lock into sockets in tight spaces with offset pins on the base; one pin is slightly higher on the base than the other pin. Brightness is measured in lumens; the higher the lumens, the brighter the bulb.
Light | Bulb | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Bulb Trade No. | Voltage | Wattage | Brightness | Tech. | Intensity Setting | Rated Life | Color | Overall Lg. | Dia. | Material | Shape No. | Pkg. Qty. | Pkg. | |||
Double Contact—BAY15d (0.6" Dia.) | ||||||||||||||||
Tapered Bulb | ||||||||||||||||
| 1157A | 12.8V AC 12.8V DC 14V AC 14V DC | 8.26 W 26.88 W | 28 lm 302 lm | Incandescent | 2 Way | 5,000 hr. 1,200 hr. | Amber | 2" | 1" | Glass | S8 | 10 | 9527T116 | 00000 | ||
Screw-In-Base Light Bulbs
 |
Flat-Top Bulb |
Your go-to bulbs for everyday use in standard sockets.
Use the light appearance to match older bulbs in your facility.
Plastic Bulb—Plastic bulbs are shatterproof.
Light | Bulb | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Equivalent Incandescent Bulb Wattage | Color | Intensity Setting | Tech. | Brightness | Material | Dia. | Wattage | Rated Life | Overall Lg. | Each | |||
Flat-Top Bulb—Medium (Standard Household) Base (1 1/16" Dia.) | |||||||||||||
120V AC | |||||||||||||
| 20 W | Amber | Not Dimmable | LED | 40 lm | Plastic | 1 3/4" | 2.4 W | 100,000 hr. | 3 1/2" | 6585T52 | 0000000 | ||
Screw-In-Base Floodlight and Spotlight Bulbs
PAR38 Bulb Shape—Medium (Standard Household) Base (1 1/16" Dia.)
 |
PAR bulbs throw tighter, farther-reaching spotlight beams, like those in outdoor security systems.
