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Are All Halogen
Bulbs The Same?
All halogen
bulbs are not the same. Heavy duty halogen bulbs
are designed and manufactured for high vibration
application. Standard halogen bulbs are well
designed bulbs but they do not deliver the same
long life that heavy duty bulbs typically
deliver when used on high vibration
applications. Because heavy duty bulbs deliver
significant longer life in heavy duty
applications, they are better suited for rugged
off-highway applications. Heavy duty halogen
bulbs cost 2 to 3 times more than standard
halogen bulbs. However, the service cost savings
(life cycle bulb replacement costs – bulb and
labor) normally are significantly more than the
added cost of the heavy duty bulb.
How Do Bulb
Manufacturers Rate Bulb Life?
Bulb life statements made by bulb manufacturers are
based upon “Still Burn Life” tests. The burn test
entails testing a test group. The bulbs are
powered by a regulated voltage. These bulbs are
allowed to burn to a certain percentage of group
failure. These Still Burn Life statements are
expressed as either “TC” or “B3” Life
Statement.
“Tc” Life Statement
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Tc= average still bulb burn life in
hours at which 63.2% of the bulbs are still burning.
Ê
Example:
“B3” Life Statement
Ê
B3 = verage still bulb burn life in hours at which
96% of bulbs are still burning
Ê
Example:
Lens Patterns
Connectors
Brackets
DMK lights are
available with dampened or undampened brackets in
three different heights; 25mm, 30mm or 40mm.
Dampened brackets are recommended for off-road uses
or in environments where the light may be subjected
to excessive vibration. Brackets are also available
in three mounting bolt sizes; M8, M10 or M12. Please
call our knowledgeable support staff at 715-344-8600
to discuss your specific needs.
Lighting FAQ
What is the
Effect of Voltage on Bulb Life and Light Output?
Halogen bulb manufacturers develop bulbs to
operate at a “design voltage” (Rated Voltage). Bulb
light output and life statements are based under
testing bulbs at their Rated Voltage. Operating a
bulb at more than or less then its Rated Voltage
affects both its life and its output.
What is a Lumen?
Luminous Flux is the total “effective” output of
a lamp. Luminous Flux is expressed in Lumens.
The larger the lumens, the larger the output of
the lamp.
What is a Candela?
Luminous Intensity is light intensity through
space. Luminous Intensity is expressed in
Candela. The larger the candela, the brighter
the light.
What Is Lux?
Illumination (luminance) is light density
falling upon a surface. Illumination is
expressed in Lux. The larger the lux, the more
light on the ground.
Examples
1 Lux = 1 lumen per square meter
5 Lux = 5 lumens per square meter
What is Foot Candle?
Foot Candle is also a measure of light density
falling upon a surface.
Examples
1 Ft. Candle = 1 lumen per square foot
5 Ft. Candles = 5 lumens per square foot.
Ft.
Candle vs. Lux
1
Lux = .0929 foot candles
1 Ft. Candle = 10.76 lux
Illumination Examples
Sunny Day 100,000. Lux
Office Lights 100. Lux
Full Moon 0.1 Lux
Overcast Night 0.0001 Lux
Reference Info
Millimeters = inches x 25.4
Inches = mm x .03937
Newton Meters = inch pounds x 0.113
Inch Pounds = Nm x 8.849
Kilometers = miles x 1.609
Miles = kilometers x 0.6214
Watts = volts x amps
Horse Power = watts x 0.001341
For more information contact one of our
Alliance Partners.
Information contained herein can change at anytime
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