Our LED-based roadway lighting products offer a number of key advantages over traditional lighting technologies. In terms of luminous efficacy, product life cycle, field maintenance requirements, colour, and environmental considerations, the technology employed in our product range is vastly superior to high-pressure sodium, metal halide, and induction lighting technologies Our Solid State LED-based products are designed to provide long life through the design of the light source, power supply, optics and mechanical housing. Our products are also free of lead and mercury and are RoHS compliant.
A sodium vapor lamp is a gas discharge lamp which uses sodium in an excited state to produce light. There are two varieties of such lamps: low pressure (LPS) and high pressure (HPS). As the cheapest lighting technology currently available, it has become the most popular fixture on today's roads, although it has a number of disadvantages. HPS fixtures offer poor luminous efficacy when compared to LRL products. In terms of colour (appearance), HPS fixtures tend to be yellowish, rather than the bright white emitted from high-powered LEDs. HPS bulbs also last about 25% as long as the LEDs used in our products, necessitating significantly increased maintenance. Lastly, sodium vapor fixtures are not RoHS compliant, as they contain several hazardous materials, such as mercury and lead.
Metal halide fixtures are also prominent on many roadways, and they exhibit the same downfalls as their HPS counterparts. Metal halide technology offers even less energy efficiency than HPS, which means a significant deficiency versus our LED-based products. They also contain lead and mercury and are therefore not RoHS compliant.
Induction based fixtures are relatively new to the market. Induction lamps use radio frequency or microwaves to create induced electrical fields, which in turn excite gases to produce light. Induction lights have a rapid start-up and work at peak efficiency with minimal warm-up time, much like LED technology. This technology has some advantages versus HPS technology in the areas of efficiency and life cycle, however, initial cost barriers and the rapidly evolving nature of LED technology have led to limited adoption of induction based roadway lighting systems. Another limitation of Induction Lighting is that it has limited directionality when compared to LEDs. Induction lamps also contain lead.
