| Frequently
asked questions |
|
What is the difference between a 125V and a 130V CAX Eye Chart Projector bulb? |
|
How can I eliminate shadowing on my Eye Chart Projector? |
|
What do I do if my order arrives damaged? |
|
What does 'Rated Average Life' of a light bulb mean? |
|
What is the shelf life of light bulbs and batteries? |
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Can I get credit for expired batteries? |
|
How do I dispose of my batteries, can I recycle them? |
|
What does CRI
(Color Rendering Index) mean?
|
|
What is the Color Temperature of a light bulb? |
|
What is a
halogen lamp?
|
|
Will handling a halogen bulb shorten its life?
|
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What are Watts? |
|
What are lumens? |
|
|
What is the difference between a 125V and a 130V CAX Eye Chart Projector bulb?
|
| The 130V bulb will allow for more fluctuation in the voltage and can better withstand small spikes of current. Even though they are both rated for 50 hours of life, the 130V bulb should last a little longer than the 125V bulb. On the other hand, the 125V bulb may be slightly brighter. |
|
How can I eliminate shadowing on my Eye Chart Projector?
|
| Try rotating the bulb 180 degrees in the socket so that the pins are reversed. If you have tried several bulbs and they are all showing shadows, the socket may be misaligned, or possibly the small mirror inside is misaligned. If you are still getting shadows after checking everything, the bulb may be defective. |
|
What do I do if my order arrives damaged?
|
| If the contents of the package arrive broken, please notify us immediately. We will file a claim with the carrier and send you out replacements. Please save all packaging for the carrier to inspect. |
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What does 'Rated Average Life' of a light bulb mean?
|
| Rated Average Life of a light bulb is not a warranty. It is only an estimate of how long a bulb will last. Some will last longer and some will burn out a bit sooner. |
|
|
What is the shelf life of light bulbs and batteries?
|
| Light bulbs do not expire, they do have an average expected lifetime in hours used. Batteries do have an expiration date. Each battery will be marked by the manufacturer with the
expiration date. Lite Source Inc. will only sell fresh batteries and
you can be assured that our batteries will have an expiration of at least a year (or longer) from date of purchase. |
|
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Can I get credit for
expired batteries? |
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No. Once the batteries have expired, no credit can be issued. |
How do I dispose of my batteries, can I recycle them? |
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You can call 1-800-822-8837 to find a location near you for recycling. |
|
|
What does CRI (Color
Rendering Index) mean?
|
|
It measures the effect a light source has on the perceived color of objects.
The higher the CRI (closer to 100) the more natural and vibrant the colors
become. |
|
|
What is the Color Temperature
of a light bulb?
|
| Color Temperatures of 2000K-3000K are
considered "warm" and have a yellowish tinted light. Color
Temperatures of 5000K> are considered "cool" and have a blue tinted light.
Natural daylight is considered to be 6000K. |
|
| What is a halogen lamp?
|
| Halogen bulbs contain a high pressure tungsten
filament and are filled with halogen gasses. The halogen gasses allow
the filament to operate at higher efficacies than
regular incandescent lamps. Halogen lamps provide brighter, whiter
light with better color characteristics, longer service and improved energy
efficiency. |
| Will handling a halogen bulb shorten its life?
|
| Yes, if you handle the bulb with your bare hands. The oils from your skin will be transferred to the glass of the bulb. The halogen bulb gets very hot and the oils from your skin will create a 'hot spot' and burn the bulb out faster. If you accidentally touch the glass part of the bulb, simply wipe it off with some alcohol to remove the fingerprints. Do not try this with a bulb that is hot, it may burn you or crack, wait until it cools down. |
|
|
What are Watts?
|
| Watts are a unit of electrical power.
Lamps are rated in watts to indicate the rate at which they consume energy. |
|
|
What are lumens? |
| Lumens are a measurement of overall light output. |
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