Lamps ordered will be shipped the next day by mail or the same day by Federal Express. Large orders may qualify for a discount and may not qualify for same day shipment. Lamp prices do not qualify for the additional discounts associated with accounts. If you do not know what lamp you require or for lamps not listed below email your request or call toll free 877-855-7883. To order online, please use our online order form.

 1. Lamp burns out before end of life 

Line voltage lamps may be subject to power swings. Check line voltage. Minimize power swings to less than 20%. 

 2. Lamp turns black 

Is the lamp over cooled?  Direct airflow on the bulb can cause the lamp to turn dark. Minimize cooling. 

 3. Large bubbles swell up on the bulb 

May also be related to over cooling.  Dark spots that have collected on the bulb will absorb heat then the quartz may bulge.

 4. Base cracks or breaks 

Often related to installation and poor quality or damaged sockets. Check and maintain the sockets. Are they oxidized, burned or bent and dirty? Periodically replace them. 

 5. White haze on the quartz 

May be silica haze or smoke. Generally not a problem and most often is silica left over from the production process. Again, typically will not cause a performance problem. Contact USHIO America, Inc. if you have questions. 

 6. Varying resistance across lamp 

Most of time this is humidity related. Finite pins amounts of moisture collect in the base. Should this be an issue, the solution may be as close as a heat gun or drying oven.

 7. Changing lamps too often on large lamp installations 

It is very important to change all the lamps on large circuit strings at the same time. Lamps all have some sort of average life. Should you just change a few lamps at a time as they burn out, you may later find a whole series failing, usually at an inopportune time. These additional lamp failures may be simply related to the fact that they have reached end of life. 

 8. Variations in color temp across

Make sure the voltages to all the lamps are strings of lamps consistent. Power variations can cause some lamps to operate above or below rated color temperature. 

 9. Unexpected lamp burst 

Never handle lamps with bare fingers. Inspect the bulb for accumulated dust or dirt. Wipe the bulb as need be with alcohol and a lint free cloth. 

 10. Broken or melted filaments 

Make sure the lamps do not encounter serious vibration. The lamps should never be over driven. Maintain maximum voltage rating at all times. 

When changing quartz lamps, be careful not to touch the quartz glass surface with your skin. This can decrease the lamp life and/or discolor the lamp during use. 

When changing, hold a quartz lamp with the paper included with the lamp.

Any bulb more than 150 watts has a CYCLE time, 10 min on then 10 min off.
 

When purchasing lamps, always check the manufacturer's specifications and UL listing for the lighting fixture. Just because a lamp will fit doesn't mean you can use it!

The sun for example rises at approximately 1800 Kelvin and changes from red to orange to yellow and to white as it rises to over 5000 Kevin at high noon. It then goes back down the scale as it sets.

The most typical Kelvin degree lamps used in task lighting are as follows:

2700°          Friendly, personal, intimate                 Homes, libraries, restaurants
3000°          Soft, warm pleasing light                     Homes, hotel rooms and lobbies
3500°          Friendly, inviting, non-threatening       Executive offices, public reception areas, supermarkets
4100°          Neat, clean, efficient                            Office, classrooms, mass merchandisers, showrooms
5000°          Bright, alert                                          Graphic industry, hospitals
6500°          Bright, cool                                          Jewelry stores, beauty salons, manufacturing
 
 

Color Temperature:

        Standard Domestic Light Bulb (40-60w) 2800K
        Standard Domestic Light Bulb (100-200w) 22900K
        Standard Domestic Light Bulb (500-1000w) 3000K

These bulbs will be significantly "warmer" (orange/red) than tungsten light sources designed for photographic purposes. Remember the color temperature of quartz halogen fixtures is 3200K. 

Standard household bulbs are not very diffuse. They tend to burn hotter in the center. You may find this undesirable, especially, if the light source is in frame.

Options exist which allow you to use ordinary household fixtures as well as clip lights and special fixtures you can make for your own purposes. Photographic suppliers and expendable supply stores carry several color correct light bulbs which will fit into standard light sockets.

Enlarger Bulbs are widely used in motion picture lighting. They are evenly diffuse across the surface of the bulb, have a proper color temperature of approximately 3200K and come in three wattages.

        PH211 = 75w (color 3200K)
        PH212 = 150w (color 3050K)
        PH213 = 250w (color 3400K)

Photofloods (standard pear shaped) are another option. The most common sizes are: 250w and 500w.

        BBA (No.1) = 250w (color white 3400K)
        BCA (B-1) = 250w (color blue 4800K)
        ECT = 500w (color white 3200K)
        EBV (No.2) = 500w (color white 3400K)
        EBW (B-2) = 500w (color blue 4800K)

Reflecting Globes (RFLs) (mushroom shaped) are another option:

        DAN (R-20) =200w (3400K)
        BEP (R-30) = 300w (3400K)
        EAL (R-40)= 500w (3300K)

There is a formula for incandescent bulbs that says: 

                       (Actual Life/Rated Life) = (Rated Volts/Actual Volts)^13.

                       Take a 130 volt, 1000hr rated bulb and feed it 123 volts and you get:
                       AL/1000=(130/123)^13 or 2053 hours actual life.

                       In contrast, take a 120 volt 1000hr bulb and feed it 123 volts and you get:
                       AL/1000=(120/123)^13 or 725 hours actual life.

                       Those 130v bulbs are life savers in hard to reach fixtures.

Lamp failure occurs due to a mechanical break in the tungsten filament winding. As the lamp operates the tungsten filament becomes thinner due to evaporation and it eventually breaks. Failure may be accelerated by factors, such as, mechanical shock, vibration, high line voltage and temperature.

Lamp failure in an overhead projector can be due to mechanical shock. This occurs when using the lamp changer or bumping the unit while the lamp is operating. A hot lamp filament is very fragile. You should always make sure the unit is turned off and the lamp is cool before moving the lamp changer or the unit.

Each time you turn the unit on there is an inrush current that applies stress to the lamp filament. The more often this stress is applied the sooner the lamp will fail. For this reason turning the overhead projector "on" and "off" frequently during presentations is not recommended. Some projectors have a "soft start" power supply that provides a gradual voltage increase which limits the inrush current shock. This results in extended lamp life.

Improper cooling can cause lamp envelope seal failure or lamp capsule swelling. Always make sure the fan is operating and the intake and exhaust vents are not blocked.

High power line voltage is a major cause of short lamp life. Using a voltage less than the rated lamp voltage will increase lamp life but, reduce light output. Higher line voltages will reduce lamp life but, increase light output. The table below shows an example where a lamp at normal 120VAC line voltage would have a 75 hour life, however, if the line voltage increases to 130 VAC it will only last 28 hours.

Some lamps have a version for use where the power line is consistently higher than 120 volts. If your projector is equipped with a" high/low lamp" switch you can extend your average lamp life by using the "low lamp" position whenever possible. Also, some projectors are equipped with regulated power supplies that deliver the correct voltage to the lamp. This also extends the lamp life.

When installing lamps, be sure the lamps are seated completely. The tendency is to stop at the first sign of resistance. Continue to apply force at the base of the lamp until you are sure the lamp is secure.

To extend your projectors lamp life; run at the lower lamp setting, be sure vents are open, minimize the "on" and "off" cycles, assure lamps are completely seated, and don’t bump an operating unit. Also, for high line voltages consider the use of special lamps. 

For information on recycling your light bulb ("lamp") spent mercury-containing lamps go to:

Halogen lamps operate at extremely high temperatures that can cause serious physical injuries and property damage. 

Only use Halogen lamps in Halogen-approved fixtures. Fixtures should fully contain any parts of the Halogen lamp upon the event of a lamp burst. 

Do not use Halogen lamps in close proximity to paper, cloth or other combustible materials that can cause a fire hazard. 

Lamps are very fragile. Do not drop, crush, bend, or shake them. 

Do not touch the Halogen bulb surface or inside reflectors with your bare hands. Oils from skin can lead to breakage or shorten the life of the lamp. Use clean gloves or lint free cloth for installation and removal. 

Clean any dirt, oil, or lint away from the lamp with alcohol and a lint free cloth or tissue. Any foreign particles or materials on the bulb surface can cause hot spots on the bulb and result in lamp failure. 

Never touch the lamp when it is on, or soon after it has been turned off, as it is hot and will cause serious burns. 

Do not look directly at the operating lamp for any period of time; this may cause serious eye injury. 

Always turn off the electrical power before inserting, removing, or cleaning the lamp. 

Affix the lamp securely in the socket. Improper installations will cause electrical arcing, overheating, and short life to lamp and socket. Replace lamp holders and sockets when necessary. 

Keep the temperature of the Halogen lamp seal below 350°C. 

Keep the temperature of the Halogen lamp wall above 250°C. 

Keep the temperature of the Halogen lamp bulb wall below 800°C. 

Make sure lamps of specified wattage and voltage are only used in appropriately rated fixtures. Unspecified use will lead to short lamp life, breakage and overheating of fixture. 

Lamps should not be operated beyond the total rated voltage. Avoid the use of dimmers that may drive your lamp over its rated voltage. 

Operate the lamp only in the indicated burn position. Failure to do so will lead to overheating and short life of the lamp. 

Use an external fuse when required. 

Do not allow one lamp to directly expose another. This may lead to overheating and shortened lamp life. 

Metal Halide discharge lamps emit ultraviolet radiation which is harmful to eyes and skin! 

Metal Halide discharge lamps should only be used in enclosed fixtures with ultraviolet absorbing filter glass. Failure to do so may cause serious skin burn and eye damage. Do not use these lamps in fixtures where any unfiltered light is emitted from the fixture. Do not operate these lamps if the ultraviolet absorbing filter glass is broken or not installed. 

Metal Halide discharge lamps should only be operated in an enclosed fixture that safely contains all lamp parts in the event of a lamp burst or rupture. These lamps operate at a high internal pressure and at high temperatures. A lamp burst may occur causing physical injury and property damage. 

Lamps should never be operated beyond their rated useful life. The risk of a lamp burst increases with lamp age, temperature, improper operation, and improper handling. 

Never bump, drop, apply excessive stress, or scratch the lamp. This could cause the lamp to burst! Do not operate any lamps with any traces of scratches, cracks, or physical damage. 

Never operate a lamp above or below its rated current or voltage. This may cause the lamp to leak or burst. 

Always turn off the electrical power before inserting, removing, or cleaning the lamp. 

Clean any dirt, oil, or lint away from the lamp with alcohol and a lint free cloth or tissue. 

Electrical connections should be clean and in good condition. Replace lamp holders and sockets when needed. Affix the lamp securely in the socket. Improper installations will cause electrical arcing, overheating, and short life to lamp and socket. 

Never touch the lamp when it is on or soon after it has been turned off, as it is hot and will cause serious burns.

Lamps should be allowed to cool for a minimum of ten (10) minutes after the lamp is turned off. 

Do not use lamp in close proximity to paper, cloth or other combustible material that can cause a fire hazard. 

Do not look directly at the operating lamp for any period of time; this may cause serious eye injury. 

Metal Halide discharge lamps contain mercury. Please refer to your local environment laws regarding disposal and recycling of mercury containing lamps. For more information, please go to www.lamprecycle.org

WARNING! Xenon arc lamps could burst when not in operation causing serious injuries! It is critical to follow safety instructions when handling Xenon arc lamps! 

Xenon arc lamps have a high internal pressure. Depending upon the lamp, the internal pressure can exceed 10 ATM or 147 PSI, even when not in operation. 

Always wear eye/face and body protection when handling Xenon arc lamps! 

Never bump, drop, apply excessive stress, or scratch the lamp. This could cause the lamp to burst! 

Always transport the lamp in the provided protective case or cover until installation! 

Save the protective case or cover and packaging materials (box) for lamps that have been used to their rated service life. Use the protective case when disposing of the lamps. 

Never touch the lamp when it is on, or soon after it has been turned off, as it is hot and will cause serious burns. Lamps should be allowed to cool for a minimum of ten (10) minutes after the lamp is turned off. 

Always operate the lamp in closed, protective housings. 

Do not look directly at the operating lamp for any length of time; this may cause serious eye injury. 

Do not use lamp in close proximity to paper, cloth or other combustible material that can cause a fire hazard. 

Some Xenon arc lamps produce Ozone that is considered toxic at relatively high concentration levels. Use ozone-producing lamps in lamp housings equipped with exhaust systems. 

Never operate a lamp above or below its rated current or voltage. This may cause the lamp to leak or burst. 

Affix the lamp in the correct polarity according to the lamp and fixture design. 

Affix the lamp by hand tightening only. Do not use any tools to tighten nuts or the lamp itself. Any excessive stress to the lamp will cause a burst. 

Electrical connections should be clean and in good condition. Replace lamp holders and sockets when needed. Fix the lamp and its lead wire firmly to the terminals. 

Clean any dirt, oil, or lint away from the lamp with alcohol and a lint free cloth or tissue. 

Xenon arc lamps should not be used beyond their rated service life. Operation beyond the rated service life will cause the lamp to burst. 

The lamp must be operated under the specified conditions such as lamp aperage, voltage, and cooling conditions. 

Do not overcool the lamp. Air should never be directly forced on the bulb because uneven cooling will result. 

Recommended cooling methods are: air flow, N2 gas flow, heat sink and an exhaust duct. 

The lamp base temperature must be kept below 200 degrees C. 

Xenon arc lamps must be disposed of in a careful and proper manner in order to prevent injury. 

1.Wear a protective mask, leather gloves and protective clothing when handling a spent lamp. 

2.Place the used lamp in its original protective case and original cardboard packaging (box) that was provided when the lamp was new. 

3.Firmly attach tape around the original cardboard box to seal the lamp securely. 

4.From approximately three (3) feet in height, drop the cardboard box, with the lamp and protective case inside, onto a hard floor to break the lamp. 

5.Shake the cardboard box to determine if the lamp is broken. 

The Thorn Lighting Group is one of the world's leading suppliers and manufacturers of a wide range of professional lighting fittings and systems which have broad applications in commercial, industrial and public amenity markets. 

Thorn Lighting, part of the Zumtobel AG Group of companies, has established strong brand recognition and has a turnover of £400 million. With operations in 24 countries, in 7 of which it has manufacturing facilities, the Thorn Lighting Group sells to customers in over 140 countries worldwide. 

In Europe where it is the second largest light fittings supplier, Thorn is the market leader in the UK and has strong positions in France, Germany and the Nordic region. The Group is the leading supplier of light fittings in the Australasian and Hong Kong markets and is developing further its presence in the Far East, particularly in China and Singapore.
 
 

Halco Lighting has been serving America's lighting needs for over 25 years. At Halco, light bulbs are their only business. Committed to bringing their customers the best of all global choices, they offer a complete line of products from a variety of manufacturers, including their own Prism®, Prolume®, Purelite® and Quality Long Life brand light bulbs. Their diverse inventory assortments meet virtually all their customer's lighting needs. 

Halco Lighting is a wholesale supplier of both imported and domestic light bulbs and tubes for industrial, commercial and residential applications. Additionally, they stock a full line of specialty products including light bulbs for stage/studio, audio/visual, photo/projection, as well as a wide variety of other special applications. Their business is global in scope. They supply customers in all 50 states, Canada, Mexico, Latin and South America, Europe, and Asia. 

Their mission statement is simple. It is their goal to offer immediate delivery of quality products at competitive prices. For the protection of their customers, all Halco products are covered by their Quality Assurance Guarantee. Their commitment remains steadfast. They guarantee to offer their customers the highest standards of quality and service, excellent value, and the very best of all global choices. They are, and will always strive to remain... 

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PDQ One Hour Photo
2403-6 Battleground Avenue 
Greensboro, NC 27408 
336-282-0595 
Toll Free: 877-855-7883 
Fax: 336-282-8500 
Hours: Monday through Friday 9 am to 7 pm, Saturday 10 am to 6 pm.