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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.
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4/15/15 (Hillsdale, NY)
The bulb works great in my museum light-thanks!
3/11/14 (Spokane, WA)
2/11/14 (Chicago, IL)
Just exactly what I wanted, artrived quickly.
9/17/13 (Murrieta, CA)
These bulbs were exactly what I required for my piano light on my baby grand.
5/22/13 (Santa Rosa Beach, FL)
Works great in picture lighting.
12/24/12 (Lewisburg, PA)
Perfect for my needs. I had trouble finding replacement bulbs locally and was relieved to find this site.
12/07/12 (St. Charles, IL)
The light bulbs work great in my daughter's piano light. I couldn't find the bulbs in any store but was able to cross-reference them on your website.
12/07/12 (Delray Beach, FL)
This is the exact duplication that I was looking for. The service was great. Thank you
11/14/12 (Brooklyn, NY)
I needed bulbs for my House of Troy grand piano light, and these were perfect, and a great price.
6/19/12 (Washington, DC)
Purchased for art lighting; arrived quickly and in excellent condition. Great service.
4/04/12 (Dana Point, CA)
Just what I wanted. These picture frame lights are difficult to find and pricey when you do. These were a great price and so simple to find on eLightBulbs.
9/07/11 (Evergreen Park, IL)
These bulbs are for a GE picture light, might be called a portrait light. Westinghouse bulbs fit better and cast better light than sleazy original stuff. Also easy on my 90 year old mother's eyes. Will re-order as long as she stays alive.
6/22/11 (Omaha, NE)
Excellent lamps! I needed to re-lamp a number of wall sconces that illuminate stairways in a local theater. The lamp intensity and life span has more than met my expectations for this application.
2/11/11 (Chicago, IL)
Got these bulbs for a House of Troy grand piano lamp and they work just fine.
12/27/11 (Pensacola, FL)
These bulbs are for my wife's rather expensive piano light and due to the fixture design the bulbs don't last too long from overtemp. Also they're hard to find so I'm glad to have this ready source. Thanks!