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Q. Does operating position affect output? <br />A. No. The universal operating position does not affect the performance of the QL system. <br />Q. What is the color shift of the QL system? <br />A. The color shi ft is very small over life. In new installations the color may appear 'pink' until the system stabilizes <br />and the mercury has vaporized. The light will change to a normal white color within a few minutes. <br />Q. Is QL dimmable? <br />A. At the present time QL cannot be dimmed. <br />Q. Can the QL system be used for a "flashing beacon'? <br />A. The QL system is recommended for use in long burning applications. <br />Constant on and off switching reduces the system life significantly. <br />Q. Is QL vibration -resistant? <br />A. Yes. The fact that QL has no electrodes makes it more reliable in <br />high -vibration and gusty applications. QL has proven its durability <br />in bridges, tunnels, and signage applications. <br />M <br />Q. What, if any, is the effect of voltage supply fluctuations on the performance of the QL system? <br />A. Due to the built-in pre -conditioner in the HF generator, which provides a well stabilized internal supply voltage <br />(a wide operating voltage range of +/- 20V) to the HF generator, the light output, consumed power and system <br />efficacy (efficiency) of lamp system vary by less than 2% as a result of mains voltage fluctuations. There is no <br />noticeable effect (visual or measurable) on the color performance (color temperature, color rendering, etc.) <br />due to supply voltage fluctuation. <br />Q. Will QL- lighting -fade or damage materials? <br />A. The amount of ultraviolet light generated by an 85W QL is roughly equivalent to that of a regular fluorescent <br />lamp per 1000 lux. The permissible exposure- time (PET) is >40 hours per 1000 lux, generously above the norm <br />(24 flours per 1000 lux). The damage factor for materials is rated at a low 0.3 so QLs can generally be used in <br />open luminaires without any front glass. <br />Q. How far can the HF generator be remotely mounted from the power coupleddiscl-large vessel assembly? <br />A. The length of the coaxial cable connecting them 05 ). Because the cable forms part of the oscillating circuit <br />of the HF generator, the length of the cable cannot be modified. <br />Q. At the enol of life, must all components be replaced? <br />A. All three components are separately replaceable, however, QL is almost always supplied as a three -component <br />system, even for relamping. End of life usually means the generator must be replaced and, at the time, it is usually <br />recommended to replace the bulb, as phosphor degeneration at 100,000 hours lowers lumen output 35% to 40%. <br />Q. Why is QL worth more? <br />A. QL offers five to ten times the life of HID systems for only two to three times the cost of the HID lamp <br />and ballast. And the QL system is warranted for five years. In most cases the payback in maintenance savings <br />will more than offset the additional cost of the initial system. <br />