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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I am using this bulb in a computer desk lamp. I have no regrets on this purchase.
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Customer recommended! |
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8/22/12 (Kennett Square, PA)
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These were purchased as replacements for outdoor pathway lighting. The first time we replaced the bulbs, we ordered from a distributor. What a mistake! They bulbs were $7 EACH! These bulbs are the SAME as the $7 ones, but cost a fraction of that, and they work great!
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Customer recommended! |
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Exactly the same bulb I paid almost 8 times as much for from my patio light installers!!! Yes, I said 8 times as much and they also told us the item was on backorder! Your product saved the day or rather saved the night by helping light our patio! Thanks
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Customer recommended! |
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Great bulbs, great service...
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Customer recommended! |
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11/25/11 (Scottsdale, AZ)
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Used in outdoor lighting. Fairly east to install, works well. Happy!
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Customer recommended! |
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Product works fine, fit the base just perfect. I will order again when they fail which should be quite awhile.
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Customer recommended! |
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5/02/12 (Chocowinity, NC)
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These bulbs are very difficult for us to find in our area so I was delighted to find that we could order them. They arrived shortly after we ordered them and work well.
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Customer recommended! |
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