1. The Induction system requires 3 components, the generator, the power coupler and the lamp.
All three components are almost always supplied as a system and the manufacturers highly recommend replacing all three every relamp.2. Induction brags of 100,000 hour life span. According to their own literature 100,000 hours is to failure, not 30% degradation as with LEDs. All LED life expectancy is rated at 30% degradation or L70 (70% of initial light output). A luminous drop of 30% in Induction occurs somewhere between 30,000 and 40,000 hours, approximately half the life span of Relume LED Engines.
3. Induction systems fail predominantly due to the failure of the high frequency generator (HF Generator). The failure rate is typically characterized by the manufacturer based upon the case temperature (Tc) of this component. For example, one manufacturer specifies that, at a Tc of 72° C (161° F), at 60,000 hours 10% of the HF generators will have failed and at 100,000 hours, 35% will have failed, on average.
For each induction failure, it is recommended that both the lamp and the induction generator be replaced because, most likely, the lamp has suffered significant lumen depreciation at that point.4. Induction is only available in 3000 or 4000 Kelvin Temperatures, vs. 5500-7000 Kelvin Temperature of Relume LED for better visual acuity and rod and cone stimulus.5. Induction light sources are fairly large special fluorescent lamps.
A large source size requires a much larger reflector in order to provide suitable optical control. However, large reflectors translate into larger luminaire sizes, adding cost, weight and effective projected area to the luminaire designs. Because of these self imposed size limitations on the luminaires, most induction luminaires have poor optical control.The result is a lighting project with poor uniformities typically quantified by unacceptably high maximum to minimum and average to minimum uniformity ratios.6.
Induction’s luminous output can be greatly affected by extreme high or low temperatures. In fact with higher temperatures the enclosure must also include a heat sink in order to maintain reasonable output. The Relume LEDs are designed around hotter temperatures, inherently include a thermal dissipation process, and thrive in cold weather.7.
Induction is subjected to a color shift to the “pink” range until the system stabilizes and the mercury has vaporized.8. Induction has Mercury! LED does not. No end-of-life hazardous waste to dispose of or contaminate the water supply.9. Induction is not dimmable.
Relume LED Light engines are fully controllable.10. Induction systems are recommended for use in long-burning applications. Constant on and off switching reduces the system life significantly. LEDs have unlimited on/off duty cycles without any permanent damage. See any LED Traffic Signal.
11. Induction generates ultraviolet light which yellows plastic lenses, fades and damages colored materials. LEDs do not emit UV rays.12. Per calculations from third party companies, the LED life expectancy of the Relume product at L70 is approx. 81,000 hours at a 55c junction temperature.
The units proposed at UAB have a junction temperature of 50. 1c which would increase life expectancy at L70 to approximately 87,000 hours. There are no curves established in the LED industry to end of life as with induction.In comparison to L70 for induction versus LED it would be approx.
40,000 hours for induction and 87,000 hours versus proposed Relume LED fixtures.
