The commercial lighting industry has been dominated by lighting technologies such as fluorescent, mercury vapor, sodium vapor and metal halide and is based on a model of fixture sales with ongoing revenue coming from the inevitable bulb & ballast replacement requirements. This business model is no longer economically or environmentally sustainable, given the accessibility to induction lighting as a viable alternative.
Electrode-less induction lighting technology is achieved by the exciting argon gas electrons (colourless, odourless, tasteless and nontoxic gas) in concert with trace amounts of mercury amalgam and a tri-phosphorescent coating on the inside of a glass vessel through induction of energy in the form a 2.5 GHz radio wave by a solid state frequency generator producing a white light. Induction lighting produces accurate colours that appear natural to the eye.
The lamps appear circular and contain a non-hazardous gas (unlike the mercury inside fluorescent lights) that produces the light. With no internal filaments, or the cathode and anode contacts of fluorescent bulbs, induction lighting bulbs are projected to last upwards of 20 years.
The Major Benefits of Inductive Lighting
- Long Bulb Life (20+ years)
- Energy savings up to 80%
- Significant reduction in light pollution
- High Quality Light Output (Daylight Light 5000k)
- Low Lumen depreciation
- Low Maintenance Costs
- Flicker Free Lighting
- Instant-on and restart
- Low temperature starts (-50° C)
- Attractive ROI for most projects
These benefits are highly desirable for long-term lighting applications including municipal street lighting, parking garages, airports, recreational facilities, warehousing/production facilities and specialized security and military applications.
The Physiology of Lighting
As more cities enact dark-sky ordinances, controlling light distribution to save energy, improving public safety and reducing obtrusive light is becoming essential. More emphasis is also placed on color temperature because of its effect on night time driving.
Research has shown a correlation between pupil size and colour temperature. When it is very bright, such as outdoors in the afternoon, our eyes are most sensitive to amber or long wavelengths. As lighting levels drop, our vision becomes more sensitive to blue or short wavelengths. The cooler light of Induction causes pupils to shrink more than warmer sources such as HPS. The smaller pupil size increases visual depth of field and visual acuity. Increased depth and brightness perception can improve safety.
There is a linear correlation between colour-rendering index (CRI) and perceived brightness. The CRI of a lamp impacts our perception of brightness. The higher the CRI of a light source, the brighter it will appear compared with another lamp of the same colour temperature.
Using lamps with higher colour temperatures and CRI can make an environment appear brighter without increasing energy costs.