Solar Skylight: SunTracker brings in more light for more hours than any other daylighting system.

SunTracker uses a state-of-the-art solar powered GPS rotation control system to track the sun with a single mirror that effectively reflects sunlight into the building. The light passes through a thermal barrier, through a light well and a bottom light diffuser to effectively spread the light throughout the building.

The SunTracker tracks the sun from an hour after sunrise to an hour before sunset allowing the end user to turn the lights OFF during daylight hours.

Energy Efficient Lighting
Ciralight's SunTracker high performance daylighting system produces up to ten times more light than a passive skylight and distributes light more evenly and over a wider area.
Compared to electric lighting, it produces illumination equivalent to 800 watts of fluorescent lighting, or more than a 1,000 watt metal halide lamp. Since it does not draw any line voltage, electricity costs for lighting drop to zero during the average of 10.5 hours a day that it reflects light indoors.

The combination of lumen performance, low operating cost, long life cycle and much lower heat generation is what makes the system so energy and maintenance efficient. The system is warranted for 10 years.

High-end clothing manufacturer Patagonia, for example, installed Ciralight's SunTracker advanced daylighting system to reduce electricity consumption at their distribution center in Reno, Nevada.

The facility's requirements for artificial lighting dropped by two-thirds and operating costs, including for HVAC, fell by a third. The reason is that the spectral content of natural light produces about 2.5 times as many lumens per Btu of cooling load than electric lighting does.

That savings would avoid producing 618,200 pounds of atmosphere-warming carbon dioxide, 1,793 pounds of nitrogen oxides and 1,076 pounds of sulfur dioxide. Sulfur dioxide and nitrogen oxides pollute the air, creating smog. Nitrogen oxides harm the earth's ozone layer.

Proven Sales Increases
An Ace Hardware store manager in Martinez, CA, reported at least a 10% increase in sales after installing a SunTracker system. In addition, energy savings totaled 4.9 cents kWh/sq. ft.

Proven Productivity Increases
Scientific evidence shows that people feel, work and learn better with daylight than with electric lighting.

Research shows that:

  • Retail sales increase from 10% to 40% with daylighting in general.
  • School grades increase from 6% to 20% when compared to non day lit classrooms
  • Industrial savings include less absenteeism, higher productivity, better safety records



The market for low energy, highly efficient lighting products is enormous. Worldwide the LED market is estimated at $8 billion and growing at 20% annually. The LED lamp will have five to ten times the life, no mercury, and ultra violet or infrared radiation. It will require significantly lower amount of energy and may be qualified in various incentive programs.

For comparison purposes, an incandescent bulb has an efficiency of 10 lumens per watt. A LED has an output of nearly 80 lumens per watt and is expected to reach 150 lumens per watt in the very near future. It appears Incandescent is the past, CFL is the present and LEDs is the future? With Australia and now Canada banning incandescent bulbs, Compact Fluorescent Lamps (CFL’s) are becoming an important topic considering hazardous materials like Mercury, normally associated with fluorescent technology.

Technology leaders will also have to deal with (1) potential government legislation to tax carbon emissions and (2) incentive-based schemes to conserve energy, improve efficiency, no-emissions etc. to control pollution. Legislation means LEDs will become an even more significant issue to reduce local pollution and emissions of greenhouse gases. And in additions to evaluating various technologies, the incentive programs may need to be evaluated at the same time to make good financial sense for LEDs.

BASICS: Few reasons to consider using LED’s as an option to Incandescent lamps:
Light Bulb CFL and LEDs Comparison >>

  • Low cost of ownership
  • Converts 85-90% of electricity directly into light- Incandescent converts about 10-15% of electricity into light rest is wasted as heat.
  • Greatly reduced energy costs
  • Works on low voltage 3-12 volts
  • Can be used in interior/external application
  • No UV emission
  • Non Polluting-No mercury
  • Unbreakable
  • Shock resistant
  • No heat radiation-Cool to touch
  • Low operation and maintenance costs
  • Amazingly long life (30,000-1,00,000 Hours) (incandescent lamp life is 8000-10000 hours)
  • Available in various colors
  • No filament to burn out.
  • Eventually replace all existing forms of lighting


Solar lights are immune to power outages and blackouts; there are no wires that thieves or terrorists can cut to darken all lights at once. The systems are dependable, vandal resistant, and have a battery backup.

Ideal for Pathways - Walkways – Trails – Fence and Security


  • Ultra safe
  • Not connected to grid - will work when power fails
  • No trenching, no wiring
  • No transformers, no meters
  • No connection fees, No electric bills
  • No maintenance for at least 5 years
  • Renewable energy - Environmentally friendly
  • Easy to install and relocate
  • Battery reserve provides operation on cloudy days
  • Unsurpassed performance and reliability


  1. Where (what city) are the lights to be installed—the sun intensity is different all over the world which results in a different size product being required in Nairobi and London, for example.
  2. What is the application for the lights (roadway, parking lot, area, etc)
  3. Dimensions of the area that you want to illuminate (length & width)
  4. If a specific intensity if required, please confirm how bright do you need the light? (high, medium, low?)
  5. For how many hours each night are the lights desired? (a) All night? (b) 12 hours? (c) Other - be specific?
  6. Will the lights be mounted on a pole, wall or fence?
  7. What is the mounting height?
  8. How many lights are needed?
  9. You will buy and pay for Solar powered LED Lights?
  10. Please provide references and your bank information ASAP.

Madhu Chawla
e-communications coordinator

LEDs Technology: Light-emitting diodes (LEDs) differ from other light sources, such as incandescent and fluorescent lamps, in the way they generate white light. Unlike incandescent, fluorescent and HID sources, LEDs are near-monochromatic light sources. An individual LED chip emits light in a specific wavelength. This is why LEDs are comparatively so efficient for colored light applications. In traffic lights, for example, LEDs are rapidly replacing the old incandescent + colored filter systems. Using colored filters or lenses is actually a very inefficient way to achieve colored light. For example, a red filter on an incandescent lamp can block 90 percent of the visible light from the lamp. Red LEDs provide the same amount of light for about one-tenth the power (12 watts compared to 120+ watts) and last many times longer. However, to be used as a general light source, "white" light is needed. LEDs are not inherently white light sources.


LEDs come in two basic categories:

Low power LEDs commonly come in 5 mm size, although they are also available in 3 mm and 8 mm sizes. These are fractional wattage devices, typically 0.1 watt, operate at low current (~20 milliamps) and low voltage (3.2 volts DC), and produce a small amount of light, perhaps 2 to 4 lumens.

High power LEDs come in 1-3 watt packages. They are driven at much higher current, typically 350, 700, or 1000 mA, and—with current technology—can produce 40-80 lumens per 1-watt package.

High power LEDs come in many different shapes and sizes. Some current products from the leading LED manufacturers are shown below.

Source DOE -

Dr. Radhika Chawla, OD

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