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There is much more to a projector lamp than meets the eye; it is certainly not just a simple bulb. Sony projector lamps for instance are incredibly bright, and they only achieve this brightness via a complex chemical and electrical system, housed in a sealed module.

The lamps are precision-made components that require specialised equipment and intensive, skilled human input. It stands to reason therefore that there are few manufacturers in the world with the necessary specialist equipment to build them.

All this makes the lamp by far the costliest part of any projector; thus it follows that they are expensive to replace.

How Sony's projector lamps work

Not so long ago, projectors used halogen lamps, which gave a low intensity yellow light and burned out quickly. As digital technology arrived, so did the new generation of powerful metal halide lamps. This powerful light (Sony's projector lamps average 1000 lumen or higher) is necessary to activate the LCD or DLP panel that then produces the superior images modern projectors are known for.

Sony projector lamps operate by sending an electrical current across an ultra-high pressure ARC tube containing mercury vapour. The tube responds by generating an incredible amount of heat - hot enough to vaporise the mercury vapour, which then responds by generating a bright light (or plasma) onto the LCD screen.

ARC lamps contain various gases; Sony projector lamps contain mercury vapour as this produces an intense, white light ideal for image projection.

The pros and cons of Sony projection lamps

Metal halide lamps produce an incredibly high light output for their size, making them ideal for use in compact, modern Sony projectors. Although they are expensive, they typically last for 2000 hours or more - much longer than the old halogen bulbs.

The downside of this is the amount of heat they produce - a cause of early burnout - and the safety aspect. Sony projector lamps need special fixtures to enable soft operation. They are also a "point" light source, so need auxiliary components, such as quartz reflectors, to focus the light where it's needed.

Why genuine projector lamps from Sony cost what they do

Replacing a worn-out projector lamp is about more than just a bulb. Mercury vapour is hazardous, especially when it is igniting under pressure. Therefore, the bulb has a thick glass lens in front to protect the user should the bulb explode.

Sony projector lamps are linked to auxiliary systems, which control the electrical discharge levels during start-up and operation. During assembly it is extremely important the bulb is aligned correctly with the reflector and this must be remembered when it is replaced so the projectors are designed to make this process simple.

A projector bulb is rather delicate, and can easily be damaged. This makes replacement of the bulb alone a specialist job, best left to a qualified technician. Instead, Sony projector lamps are sold as a complete unit, comprising both the projector bulb and housing making it easy for anyone to install a genuine Sony projector bulb.

Although this makes Sony projector lamps a little more expensive, it also means the average user can replace them with just a basic screwdriver and saving much more money in the long term.

The author James Kean represents JP-UK, a specialist UK supplier of projector lamps and bulbs as well as ink toners and cartridges. For further information, follow the link for projector lamps and find out more.

Top 10 Reasons You Need To Switch To LED Light Bulbs

Light emitting diodes (LEDs) have been turning up all over the place, which leads one to wonder why. What's so great about these little lights? Why are we seeing more and more LED light bulbs cropping up on everything from cars to traffic lights? LED light bulbs have some very clear advantages over other types of lighting, such as:

1. LED light bulbs last longer. Without a filament to break or burn out, LED light bulbs can last for over 100,000 hours without showing their age (that's over eleven years at full brightness). This lifespan is twice that of typical fluorescent bulbs and twenty times longer than incandescent light bulbs.

2. They are energy efficient. An incandescent light bulb loses 80 percent of its energy to heat, leaving only the last 20 percent for light. LED light bulbs turn this around, giving up a scant 20 percent of their energy to heat loss. Not only that, but they operate at 10 to 20 percent of the power required for incandescent bulbs of similar brightness.

3. LEDs are more colorful. LED light bulbs can be made in a vast array of colors without the use of extra filters, which brings down production costs. They also provide a truer, brighter color than a filtered bulb.

4. LED light bulbs work in silence. The days of humming bulbs came to an end with the creation of LEDs, so there's no need to lose sanity listening to the thrum, tick, or ping of other light bulbs.

5. They are incredibly safe. With so little energy lost to heat and so little energy used overall, LED light bulbs run cool, which means no burnt fingers or burnt down houses. They are extremely durable thanks to their solid-state construction, so there's no broken glass to deal with, either.

6. LED light bulbs are focused. LEDs can be made to focus without the use of extra reflectors or lenses, which means less bulk and lower cost for the same beam of light.

7. They are the best for dimming. Incandescent bulbs turn yellow when dimmed, while LED light bulbs retain their true colors.

8. LEDs are versatile. Thanks to the wide array of colors and shapes LEDs be made to replace most any light bulb. Their diminutive size and power-sipping nature also open up a world of possibility, from infrared remote control lights to ultra-light headlamps.

9. LED light bulbs bring light quickly. Lighting up to their full brightness in microseconds, LEDs are a safer choice when reaction time is a factor, like when that car in the fast lane slams on the brakes.

10. They promise a brighter future. LED light bulbs don't contain mercury, like compact fluorescent bulbs do. Combining that with the fact that they outlast their energy efficient cousins, makes the choice to go LED clear as day.

LED light bulbs have a staggering number of uses, and somehow they keep excelling at all of them. When it's time to shed light on the subject, this jack-of-all-trades masters all.

About the Author

Thomas Baxter is a principle with
EcoDirect
, a environmentally conscience company committed to provide communities and businesses with products such as
solar power panels
and
wind turbines
. Email thomas@ecodirect.com for more information or additional articles on solar and wind power.

How far to keep the solar panel from light?

A work-light is used to drive the solar winch in the. The approximate shape of the work-light’s reflector is a three-dimensional trapezoid 3.0” in height with a 6.0” x 4.5” base and a 2.0” x 1.5” top. The reflective insides of the work-light allow 100% of the light created by the tungsten filaments to escape from the 6.0” x 4.5” opening.
The active area of the solar array upon which the light is projected is a rectangle approximately 14” x
8.5”. Provided the work-light is situated with its opening perfectly parallel to the plane of the solar array,

At what distance (or range of distances) should the work-light be separated from the solar array to maximize power output of the solar array?

You would want to place the light so that all of the light falls within the boundaries of the solar panel.

The only unexpected effect would be heating of the panel, which would reduce its efficiency. So keep the panel out of the path of the hot air rising from the light.

Skyline Solar Receives Accelerated Patent Approval Under Green Technology Pilot Program
MOUNTAIN VIEW, Calif.----Skyline Solar, a manufacturer of High Gain Solar arrays for the commercial, industrial, government and utility markets, today announced that the US Patent and Trademark Office issued patent number 7,709,730, which covers fundamental aspects of Skyline Solar’s HGS architecture.

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