Home Power with Sun Power
Long after the sun has set, our lights are still on. Use the sun to provide your own source of electricity to even the most remote homes. Siemens Solar electric systems power 12-volt appliances; lights, T.V.'s, two-way radios, water pumps, small refrigerators, telephones and more. Siemens solar systems run small a.c. electric tools and equipment with a simple inverter.
Siemens Solar Industries
The Siemens module is the heart of any solar electric power system.
• Rugged and environmentally safe
• Completely quiet
• Engineered for maximum power
• Reliable and low maintenance
• Cost efficient
And all UL Listed solar electric power modules carry Siemens' 10 year warranty. The New World Leader in Solar Technology
WE OFFER:
• Complete line of balance of systems products
• Computerized system sizing
• Installation
• Alternate energy products
• Group buy drop shipments
CALL TODAY FOR FREE BROCHURE Phone 301-686-2500 FAX 301-686-6221
ATLANTIC SOLAR PRODUCTS, INC.
9351 J PHILADELPHIA ROAD • POST OFFICE BOX 70060 BALTIMORE, MARYLAND 21237
Efficient Lighting
|
Lamp |
Initial |
Lumens |
Lifetime |
Min. Start |
Color |
Color |
|
Type |
Lumens |
per Watt |
in hours |
Temp. |
Temp. |
Index |
|
7w. twin tube |
400 |
57 |
10000 |
0 °F. |
2700 °K. |
82 |
|
9w. twin tube |
600 |
67 |
10000 |
25 °F. |
2700 °K. |
82 |
|
13w. twin tube |
900 |
69 |
10000 |
32 °F. |
2700 °K. |
82 |
|
13w. quad tube |
860 |
67 |
10000 |
32 °F. |
2700 °K. |
82 |
|
18w. quad tube |
1250 |
69 |
10000 |
32 °F. |
2700 °K. |
86 |
|
26w. quad tube |
1800 |
69 |
10000 |
32 °F. |
2700 °K. |
86 |
|
25w. Incandescent |
260 |
10 |
1500 |
2500 °K. |
91 |
Energy-Efficient Lighting- Compact Fluorescents on 120 VAC
George Patterson
©1990 by George Patterson
Compact fluorescent lights are one of the most energy-efficient lamps available on the market today. They produce 3 1/2 times more lumens per watt than incandescent lights and 7 to 13 times the lamp life of a standard "A" type incandescent. The lamps use 70% less power than standard incandescents. Modern types use high frequency electronic ballast and produce silent, flicker-free light. These lamps are color correct. They produce light that is a very good imitation of daylight. We are seeing a revolution in lighting!
Compact Fluorescent Lamp Data Compact Fluorescent Lamp Data
The data in the table shows performance data for six compact fluorescent lamps and two types of incandescent lamps. Lumens are a unit of light intensity and ranks the lamps by brightness (the higher the lumen value the more light the lamp produces). Lumens per watt shows how efficient the lamp is. Note that the compact fluorescents are about six times more efficient than incandescents. The lifetime (in hours) is rated by the manufacturer assuming that the lamp remains burning for three hours when switched on. Minimum starting temperature is just that, the lowest temperature at which the lamp will reliably start. Color temperature is a scientific system for measuring the spectral output of a light producing object. In the color temperature scheme, the object color is related to a black body at a certain temperature in degrees Kelvin (°K.). The color rendition index is more easily understood. The color rendition index of daylight is 100 by definition. The closer a lamp's color rendition index is to 100, the closer its color is to daylight. OK! Are all of these lamps real? How do they apply to real life? The fluorescent light as a system The lighting fixture is truly an energy system with four elements - 1) Input power, 2) Ballast, 3) Starter, and 4) Fluorescent tube. The efficiency and performance of the system is dependent on the interaction of all four elements. Change any one element and the light's performance and efficiency changes.
The reality of lighting is that we are not going to get something for nothing. Of course, in trying to do so we are likely to take ourselves to the cleaners. There is no substitute for doing our homework and making decisions based upon actual experiences. The 10,000 hour life figure quoted for most compact fluorescent tubes is just a starting point. The truth is that we may get anywhere from 2,000 to 20,000 hours from the same tube depending on the ballast type and operating environment. The light output from a 13 watt compact fluorescent tube may be 900 lumens at 75° F (100%), 720 lumens at 120° F. and 450 lumens at 40° F. This is especially a problem where housings and lighting fixtures trap heat inside, or they are used outdoors in the cold.. A typical graph of the operating temperature characteristics is shown at right. Note that the efficiency we seek so dearly is affected by the position of the base.
Ballast and tube life on inverters ( square wave ) may be cut in half compared to use on true sine wave for 120 VAC applications. On modified sine wave inverters there are no known problems, but the jury is still out. Tube Life and Starting
The electronic ballast may deliver promised efficiency, but the design of the starting circuit is critical. Some compact fluorescent tubes have built in glow discharge starters, while others use pre-heat filaments for starting. Pre-heat filaments require external starting circuitry. Life of compact fluorescent tubes designed for use
Temperature characteristics DULUX®S 5 W; 7W; 9W, 11W, 13 W DULUX®S/E 5W, 7W, 9W, 11W DULUX'L 18W, 24W, 36W
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Free burning lamp / draughtfree 40 50 60° Ambient lamp temperature Free burning lamp / draughtfree 40 50 60° Ambient lamp temperature Efficient Lighting |
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