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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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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.
12/19/14 (Oak Creek, WI)
Absolutely love,love these colorful bulbs.They emit a beautiful soft glow in my apartment. Am so glad I found these bulbs at eLightBulbs.
11/19/14 (Calimesa, CA)
9/24/14 (Fargo, ND)
Very interesting and cool. Love it
9/18/14 (Gainesville, GA)
I purchased this Stained Glass bulb to use in a dragonfly tiffany orb lamp. They recommend a 60 watt bulb. This lamp is not for task lighting but for enjoyment and to see all of the stained glass color display on the wall. The bulb puts/throws colors on different glass pieces which enhances the brilliance of colors. I wish that eLightBulbs had this same Stained Glass bulb in a 40 or 50 watt. I highly recommend this type of bulb in any stained glass lamps as the colors make the room come alive.
8/22/14 (Fayetteville, GA)
These bulbs are becoming harder to find in the big-box retail centers -- and we use them as porch lights and interior accent lighting. I decided to check sources online and was delighted to find them available at eLightBulbs.
7/29/14 (Sturgeon Bay, WI)
I love these in they look great in the hanging Tiffany lamp !!!!
2/19/14 (Charlotte, NC)
Very happy to receive these light bulbs. Thank you
1/13/14 (Waverly, IA)
Good quality light
6/12/12 (Port orchard, WA)
Love these bulb, local store no longer carries them....so glad I found them here. Thanks.
5/28/12 (Green Bay, WI)
Placed the bulbs on my front outdoor porch and they look great...and a few compliments from passerbyers.
4/19/12 (Danville, IL)
We love this light bulb, so we were so excited to find this website because they are hard to find.