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Carley Lamps - Lamps/Bulbs Technical Terms

T

TL

T-1

T-1.5

T-2.5

Lamp Leads/Legs

  Mean Spherical Candlepower

Foot Candles

Filament Temperature

Lumens

Wattage

Gas Filled Lamps

  Halogen Lamps

Lenses

Reflectors

Infrared Sources

Medical Lamps

Custom Made Prototype Products

  Aging and Selection

Filaments

Sockets

Vacuum Lamps

Tables, Graphs, & Illustrations






T

Tube Glass Lamps "Non Lens End"
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TL

Tube Glass Lamps with Lens End
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T-1

Tube Glass Lamp at 1 x 1/8th inch dia. or .132" dia.
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T-1.5

Tube Glass Lamp at 1.5 x 1/8" dia. or .19" dia.
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T-2.5

Tube Glass Lamp at 2.5 x 1/8" dia. or .34" diameter. Most lamps can be produced in a lens end or non lens end style.
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Lamp Leads/Legs

The legs of a lamp are called leads. Leads can be made of smaller, more flexible wire called wire leads or made with stiff thick wire called stiff pin leads. Carley Lamps uses niromet, nickel, kovar and dumet wire to produce lamp leads. All Carley unbased lamps are produced with uncut leads. If you require your lamp leads to be cut to a specific length, please specify this when ordering your lamps. There is an extra fee for cutting lamp leads.
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Mean Spherical Candlepower

MSCP (or CP candlepower for short) is the total light output of a lamp in all directions.
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Foot Candles

Total light output of a lamp when the light is compressed by a lens or reflector. Foot candles is a "directional specific" light measurement.
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Filament Temperature

The operating temperature of the filament measured in degrees kelvin.
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Lumens

1 MSCP=12.57 Lumens
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Wattage

The amount of electrical power of a lamp. Volts x Amps = Watts
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Gas Filled Lamps

Carley Lamps manufactures gas filled lamps to fill the need for higher filament temperatures. Gases used are Argon, Krypton and Xenon in order of increasing efficiency. Current draws are from .35 to 10 amperes. The lamp wall is quite hot depending upon the wattage dissipation and size of the envelope. Temperatures range from 250/300C.
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Halogen Lamps

Halogen lamps are manufactured where small lamp size and high wattage are required. Halogen light output maintenance is better than Xenon, Krypton or Argon Gas Filled Lamps. The evaporated tungsten from the filament is re-deposited from the lamp wall back onto the filament. This keeps the lamp clean allowing all the light the filament produces to escape and shine out of the glass lamp. Current Draws are from .5 to 10 amperes. Carley Lamps uses Xenon gas in all of its Halogen Lamps to ensure maximum efficiency and performance.
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Lenses

The addition of a lens to a lamp will cause light gathering with subsequent increases in intensity of up to 10X. Lenses are available on all of our lamps.
Non Lens End Lamp Lens End Lamp
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Reflectors

The use of Carley Lamps' accurate reflectors is an excellent tool in the collimation and refocusing of energy normally lost through spherical radiation. Reflectors are a simple and important tool to increase light intensity. Increases in efficiencies of 100 to 600% are commonplace when compared to a non reflectorized lamp. Carley offers parabolic, elliptical and custom made reflectors. Our standard line of reflectors is made of Aluminum. High temperature plastic reflectors are available for custom applications. The reflector's surface can be smooth, stippled or texture coated. Carley reflectors can be hand polished, aluminized, or undercoated and aluminized. Our patented Mediflector? offers a substantial increase in light output for hand held medical instruments, with no increase in lamp wattage. The Fiber Optic Laryngoscope industry has benefited considerably by using the Carley Lamps Mediflector? brand medical lamp.
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Infrared Sources

Lamps are a good I/R source and will produce energy out to 3+ microns. Carley I/R sources will produce energy to 6 microns using a Sapphire window and to 16 microns using a Zinc Selenide window. See the transmittance curves on the I/R Product Page. Different housing styles are available with collimating and refocusing reflectors. Custom I/R sources made to your unique requirements are available. Carley's standard I/R Sources featured on the I/R Product Page are parabolic reflectors. Carley Lamps welcomes the opportunity to custom make elliptical, parabolic, open and free standing I/R sources per customer OEM specifications.
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Medical Lamps

Carley's complete line of medical replacement lamps offers the highest quality at the lowest cost. Carley Medical Lamps are available in Vacuum, Gas Filled and Halogen types for use in Laryngoscopes, Opthalmoscopes, and diagnostic instruments. Quoting and building custom made Medical Lamps is a welcome opportunity for Carley Lamps.
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Custom Made Prototype Products

Carley Lamps' reputation is built upon customer satisfaction and quality products. Carley Lamps welcomes the opportunity to design and build the exact lamp, reflector, I/R source or medical lamp you require. Contact Carley for more details.
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Aging and Selection

Every product Carley sells is manufactured in a Carley Lamps Factory. Every lamp is 100% aged and selected to assure compliance to the lifetime and light outputs specified. 100% of Carley Lamps are bench energized for a minimum of 30 minutes. Tightened tolerances are available if required. Lifetime for all lamps listed on this website are rated for AC voltage input.
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Filaments

Carley Lamps uses Tungsten and Tungsten Rhenium for filaments. Rise times are dependent upon the type of lamp and the wire diameter. Electromigration (notching) occurs in small diameter wires and this phenomenon is prevalent under DC conditions which can severely shorten life. The pulsing or flashing of Tungsten Filaments can reduce lifetime of lamps due to thermal stressing. The pulsing of input voltage will not always increase a lamp's lifetime. Life hours of lamps are rated for AC energy input.
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Sockets

Carley Lamps offers convenient sockets to install our BI Pin or Stiff Pin lamps in size T-1.5 and T-2.5. Carley is currently developing sockets for T-1 lamps.
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Vacuum Lamps

Vacuum Lamps have lower filament operating temperatures and serves markets requiring lower lamp skin temperatures and price considerations. Current draws are from .01 to .7 amperes. Higher efficiencies are attained at current draws less than .35 amperes than those of gas filled design. Failure of Vacuum Lamps is caused by the development of hot spots in the filament due to cross section reduction of the tungsten or the darkening of the bulb wall due to evaporation of the tungsten filament. Ambient temperature of operation should be limited to 100C+.
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Tables, Graphs, & Illustrations

The following tables/graphs/illustrations best describe certain properties and characteristics of lamps produced in Carley facilities.

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