Difference between revisions of "Osram HQI-E"

Osram HQI-E (view source)

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→‎Suitability

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 == Suitability ==
-HQI-TS lamps are a good choice for directional lamp fixtures. If a fixture in good enough condition is found, the lamp offers good light output that could make it useful on interior as well as exterior applications. The most popular lamp wattage seems to be the 70W type, as it was powerful and compact enough to justify the purchase of a fixture that has an elliptical light beam. Garden lighting is not the best application choice as the lamps are not as suited as the 250W and 400W types offer much higher outputs. Indoor lighting is also limited since use in living rooms is not entirely attractive as flicker is present with conventional lamp gears and the lack of hot or quick restart and average lamp performance does not justify the much costlier electronic lamp gear.
+There are lamps that are designed for operation in closed and enclosed fixtures. An added advantage of eliptical lamps compared with tubular lamps, and especially for the Osram HQI range, is that lamps can be used in universal position, opening many interior and exterior operation possibilities. Indoor lighting is mostly  limited by requirements of hard to find electronic gear that eliminates flicker and improves lifetime as well as provide quick lamp restart. Conventional gear is available but hum, flicker, wiring complexity are unavoidable.
 Lower rated power output gears can be used, but it is not recommended as colour reproduction and lamp lifetime will be reduced while higher powered ones damage the lamp due to over-stressing and is highly dangerous. Used lamp gears might work but old lamps are never desirable as they degrade much quicker than mercury vapour and sodium lamps. Rusted ballast may still operate but are a potential hazard while old, used lamps, may not have much useful life left and they may already exhibit some colour light emission issues. New old-stock lamps are the best choice, if available.