42 watt - 9142B Quad - Medium Screw (E26) Base - 6,500K - Daylight
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Replaces a 250 watt Standard Light Bulb
Not a self-ballasted bulb. Must be used with a separate ballast.
This bulb has been used in relation to S.A.D. (Seasonal Affective Disorder). eLightBulbs does not diagnose, prescribe treatment or guarantee results. Although this bulb is available to the public, any medical applications, diagnosis or prescriptive treatment must derive from a qualified medical professional.
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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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.
12/04/14 (Knoxville, TN)
No problems it's a light bulb and it works. Just glad I was able to find it.
5/20/14 (Satellite Beach, FL)
Impossible item to locate in local retailers, and then I was referred to this site and just by the product number on the bulb we were able to locate this specialty item right away. I am very happy with the purchase and it was delivered in a timely manner.
4/15/13 (Cleveland, OH)
Cannot find this light bulb anymore locally. Delighted to find it at eLightBulbs.
1/26/13 (Merritt Island, FL)
eLightBulbs was the only place we could order these replacement bulbs for our outdoor security lights. Great customer service.
7/30/12 (Elmont, NY)
12/12/11 (Levittown, NY)
Very good price fcr a hard to find item locally. Shipped quickly and was perfect. Replaced a high output security light.
11/22/11 (Stamford, CT)
Purchased product for a basement area floodlight. Product delivery, quality and price all exceeded expectations, could not be more pleased.
4/10/12 (Greentown, PA)
The product is working great.
10/22/13 (Hesperia, CA)
they do not work. I bought two of them because I have three light fixtures that use these bulbs and one was burned out when my son put a new bulb in it did not work he tried the other one and it did not work either
6/08/12 (Avondale, LA)
The two bulbs I got from you worked for three nights....then went out. Put the second one in and it also worked for three nights. Now I am looking to replace with a new type of lighting fixture.