Some Disadvantages of Induction Lighting –
Induction Lighting is not a new technology just a revamped one. Induction, or QL as it is also known, combines the basic principals of induction and gas discharge in an A-lamp design. Basically it is a light without electrodes. There are several disadvantages to Induction light sources as compared to LED fixtures:
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,...
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