Lumens (light output)
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.
Average Lifetime
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.
Volts
Voltage is a measure of electrical potential.
Bulb Type
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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.
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Base Type
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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".
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Filament Type
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The filament is the style of fine wire that is heated electrically inside of an incandescent light bulb.
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Color Temperature
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.
Length
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
Width refers to the complete diameter of the widest point of the light bulb.
Beam Angle
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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Compare with other Brands
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8/08/12 (Rogers, MN)
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Great bulb. I use it for a hanging fixture in my garage, right above my workbench. Provides lots of crisp white light for my work space.
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Customer recommended! |
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We built our house in 2003 and this is the first time I needed to replace the bulbs. They are good long lasting bulbs.
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Customer recommended! |
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Super fast shipping. Speedy correspondence. Will order from again and recommend this seller. Items are competitively priced too.
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Customer recommended! |
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11/06/12 (Springfield, MO)
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Perfect product for our use and a great value for the cost. This is one of two bulbs used exclusively throughout our company. I would recommend this product.
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Customer recommended! |
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I replaced some 40 watt flourescent tubes with this and I'm impressed with the performance, illumination, despite the fact that they are 32 watt, they seem to glow like an 100 watt tube, much brighter glow and quicker starting than previous tubes.
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Customer recommended! |
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Exactly as expected for our cleanroom.
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Customer recommended! |
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The product was great. Although it was not packaged very well. Several bulbs were broken when receieved them.
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Customer recommended! |
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Product is working great, will buy from you again.
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Customer recommended! |
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9/21/11 (Fredericksburg, VA)
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I ordered this particular product because it matches exactly the original bulbs installed in our office. I am very pleased with this product.
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Customer recommended! |
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8/11/11 (Washington Island, WI)
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Arrived on time and in great shape. All bulbs work.
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Customer recommended! |
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6/13/11 (Otsego, MN)
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The Sylvania standard for your shop lights and office lights. Home run for quality and life.
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Customer recommended! |
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I ordered a case of bulbs, and I received them the next day. I will order all my light bulbs from eLightBulbs, their prices are great.
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Customer recommended! |
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Bulbs work great - last a long time
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Customer recommended! |
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7/27/12 (Gladwyne, PA)
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This product is used on a large estate with multiple bldgs. They matched up nicely with what we were using before and we have had no problems.
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Customer recommended! |
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Good product.
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Customer recommended! |
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