Light Bulbs
LIGHT BULB COATINGS REVEALED
Most light bulbs are available with a variety of coatings, or, no coating at all. Clear bulbs are useful when a stark, intense luminance is desired. If clear incandescent and halogen bulbs are fully exposed, the human eye will see the illuminated tungsten filament directly. This is used to good effect in Edison-style historic reproduction and vintage bulbs.
Clear bulbs can create hard shadows that in most cases are not desirable. One solution is "inside frost," the most common bulb coating. It is applied to most bulb types and sizes to provide soft appearing illumination. Frost produces moderate diffusion of the light with almost no reduction in light output.
Some bulbs come with a white coating. Finely powdered white silica coats the inside of the bulb. The result is more diffuse light than inside frost, minimizing shadows with very little absorption of light.
So called "daylight" incandescent bulbs are coated with neodymium that gives a bluish appearance to the light. These bulbs are not true full-spectrum bulbs; rather, they give the appearance of daylight by filtering out the warmer wavelengths light.
Other specialty coatings, such as for shatter-resistance, are also available. If you have any special coating needs please call us.
CONFUSED BY LIGHT BULB DESCRIPTIONS?
Light bulb descriptions can seem arcane, but they tell a lot about the bulb before you ever read the fine print. Let's look at two examples. Many bulb descriptions include a letter followed by a number. A few examples: A19, BR30, PAR20, ED28, T8. The letters are a code for bulb shape (Bulged Reflector, etc) and the number is the diameter of the bulb, at the widest point, in 1/8 inch increments. To calculate the diameter in inches, simply divide the number by 8. Now look at a typical fluorescent bulb description: F32T8/841. Translation: F is fluorescent, 32 is watts, T is shape (tubular), 8 is diameter (1 inch) and 841 gives you both CRI and color temperature information. The first number tells you the color temperature range; in this case in the 80s. The second two numbers indicate color temperature, so 41 means 4100K.
20W CFL - 75W Equal - 2700K Warm White Light
This E-Lume CF20/T2/27K/SPIRAL/E26/ELUME 61031 bulb uses 20 watts and 120 volts. It has a E26 medium base, and an average rated life of 10000 hours. It has a T4 lamp shape, and is a fluorescent bulb.
Substitute for 75W incandescent.
20W CFL - 75W Equal - 3000K Halogen-White Light
This Topbulb CF20/30K/E26 bulb uses 20 watts and 120 volts. It has a E26 medium base, and an average rated life of 10000 hours. It has a T4 lamp shape, and is a fluorescent bulb.
Substitute for 75W incandescent.
20W CFL - 75W Equal - 3500K Halogen-White Light
This Standard CF20/35K/SPIRAL/E26/STD 58402 bulb uses 20 watts and 120 volts. It has a E26 medium base, and an average rated life of 10000 hours. It has a T3 lamp shape, and is a fluorescent bulb.
Substitute for 75W incandescent.
20W CFL - 75W Equal - 5000K Very White Light
This Standard CF18/T2/50K/SPIRAL/E26/STD 59628 bulb uses 20 watts and 120 volts. It has a E26 medium base, and an average rated life of 10000 hours. It has a T2 lamp shape, and is a fluorescent bulb.
Substitute for 75W incandescent.
20W CFL - 75W Equal - 6500K Very Cool Daylight-White Light
This Topbulb CF20/65K/E26 bulb uses 18 watts and 120 volts. It has a E26 medium base, and an average rated life of 10000 hours. It has a T3 lamp shape, and is a fluorescent bulb.
Substitute for 75W incandescent.
20W CFL 5000K
This Aero-Tech FS4B-20W bulb uses 20 watts and 120 volts. It has a E26 medium base, and an average rated life of 10000 hours. It has a T4 lamp shape, and is a fluorescent bulb.
Substitute for 75W incandescent. Aero-Tech Evolution brand. While quatities last.
20W CFL Capsule 3000K Medium Base
Compact fluorescent lamp substitute for 60 - 75 watt incandescent. Warm white light. Minimum start temperature: minus 10 degrees F.
20W CFL Tube 2700K
This Maxlite SKT320EA bulb uses 20 watts and 120 volts. It has a E26 medium base, and an average rated life of 10000 hours. It has a T4 lamp shape, and is a fluorescent bulb.
SKT320EA
20W Circline 4100K Cool White 4-Pin
20W MR8 10 Degree Beam Cover Glass
This Eye Lighting JM-8251 bulb uses 20 watts and 12 volts. It has a GZ4 base, and an average rated life of 2000 hours. It has a MR8 lamp shape, and is a halogen bulb.
Applications: display lighting, museums, small fixtures.
2174 - 12V .04A Incandescent - Wire Terminal - Clear
The 2174 bulb utiliizes a C-2F filament. Bulb diameter is 5.1mm.
2182 Bulb 14V .08A Incandescent
This incandescent indicator bulb has an ANSI code of 2182. It uses 0.08 amps and 14 volts, and has a wire terminal base. It has an average estimated life of 10,000 hours.
2187D Bulb | 0.04 Amp, 28 Volt, 1.12 Watts, T1.75, Wire Base
This incandescent bulb with ANSI code 2187D uses 0.04 amps, 28 volts, and 1.12 watts. It has a T1.75 lamp shape, and wire terminal base. The 2187D bulb has an average rated life of 7000 hours.
219 Bulb | 0.25 Amp, 6.3 Volt, 1.58 Watts, G3.5, BA9 Base
This incandescent bulb with ANSI code 219 uses 0.25 amps, 6.3 volts, and 1.58 watts. It has a G3.5 lamp shape, and BA9 base. The 219 bulb has an average rated life of 5000 hours.
2232 Bulb - 24V .64A Incandescent - BA15S Base - Aircraft
Used in aircraft interiors, the 2232 bulb has a single contact bayonet base and a 2000 hour rated life.
233 Bulb | 0.27 Amp, 2.33 Volt, 0.63 Watts, G3.5, E10 Base
This incandescent bulb with ANSI code 233 uses 0.27 amps, 2.33 volts, and 0.63 watts. It has a G3.5 lamp shape, and E10 miniature screw base. The 233 bulb has an average rated life of 10 hours.
2341 Bulb - 24V .06A Incandescent
This Topbulb 2341 bulb with ANSI code 2341 uses 24 volts and 0.06 amps. It has a GY3.2 base, and an average rated life of 5000 hours. It has a T1-3/4 lamp shape, and is an incandescent bulb.
2341 indicator lamp.
238 Bulb | 0.5 Amp, 6.3 Volt, 3.15 Watts, T3.25, BA9S Base
This incandescent bulb with ANSI code 238 uses 0.5 amps, 6.3 volts, and 3.15 watts. It has a T3.25 lamp shape, and BA9S base. The 238 bulb has an average rated life of 2000 hours.
239 Bulb | 0.36 Amp, 6.3 Volt, 2.27 Watts, T3.25, BA9 Base
This incandescent bulb with ANSI code 239 uses 0.36 amps, 6.3 volts, and 2.27 watts. It has a T3.25 lamp shape, and BA9 base. The 239 bulb has an average rated life of 5000 hours.
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