40 watt - 120 volt - T4 - Bi-Pin (G9) Base - 2,800K - Frosted
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This refers to the literal measure of the light-output of a particular light bulb, measured in the number of lumens.
Watts (Energy Used)
"Watts" is the term applied to the amount of energy required and used by a particular light bulb. It is an international system unit of power equal to one joule per second. Contrary to popular belief, the wattage of a bulb does not directly measure the brightness; the "lumens" of a light is what defines the actual light output.
This refers to an average lifetime rating based on large quantities in test groups. This testing takes into account usage of 3 hours per start for fluorescent lamps and 10 hours per start for HID lamps.
Voltage is a measure of electrical potential.
The "Bulb Type" is typically a combination of the style of bulb as well as the width of the bulb. Usually, the first couple letters will indicate the type; "G" would indicate "Globe", "PAR" would indicate "Parabolic Reflector"... The numbers indicate the diameter of the light bulb in eighths of an inch; a "G40" would be a "Globe" style that is "5 inches" in diameter.
The "Base" of a light bulb is the part that either screws or snaps into a receptacle. Base Type terminology may indicate common descriptive words like "Medium" or "Candelabra", or may even contain numeric codes that signify size and variety, like "E26" or "2GX13".
The filament is the style of fine wire that is heated electrically inside of an incandescent light bulb.
Correlated Color Temperature (CCT) is a specification of the color appearance of a light bulb, relating its color to that of a reference source heated to a particular temperature, measured in degrees Kelvin (K). It generally measures the "warmth" or "coolness" of light source appearance.
CRI (Color Rendering Index)
CRI refers to the "Color Rendering Index" of a light bulb. CRI measures a light source and grades its ability to render the color of objects "correctly," as compared with a reference source with comparable color temperature. 100 is perfect rendering.
This is sometimes referred to as MOL, or "Maximum Overall Length". It measures the absolute length of a light bulb, from the top of the bulb to the bottom of the base and is typically expressed in inches.
Width refers to the complete diameter of the widest point of the light bulb.
The beam angle refers to the width of the light beam coming from a reflector light bulb. The higher the number, the wider the beam spread.
# of Lamps
This refers to the number of Fluorescent or HID light bulbs that this particular ballast can light.
Bulb Type Used in Ballast
This refers to the style of light bulb that this particular ballast can light.
Wherever you see this badge, you can be assured that the review has come from a customer who has purchased from eLightBulbs, ensuring the authenticity of the review.
4/26/15 (Akron, OH)
Went to several lighting store an all were close but none frosted. (T4 bin base frosted 40w 120v
Westinghouse email to check eLightBulbs.
Perfect, all is happy and my ceiling fan can live again.
1/13/15 (Stratford, CT)
The bulb is needed for a ceiling fan light kit. Very bright but also very hot. Couldn't find this bulb in the store but appreciate working with eLightBulbs to find it. Great customer service and quick delivery.
10/27/13 (Weed, CA)
The bulbs were for my son's ceiling fan. They work great.
1/19/13 (Monument, CO)
This bulb is working great and was easy to install
2/09/12 (Lady Lake, FL)
The brightness and clarity of the lights are absolutely amazing. I love the product and I would recommend it to anyone. I plan on buying more of these when I have the need to.
10/19/11 (Olney, MD)
Very fast service. Very pleased. The Westinghouse version is not as easy to find vs. cheap knockoffs of the same thing - so was happy to be able to find on eLightBulbs.com. Will purchase from agian.
8/02/11 (Rye, NY)
I bought this light bulb for the pair of bedside lamps I bought from Hong Kong. I have been looking for similar product in the nearby neighbourhood but couldn't find one. Your online service is just perfect. Thank you.
2/16/10 (Humble, TX)
Easily purchased two halogen frosted light bulbs from your store that I could not find any where else, thanks.