rated lamp life

rated lamp life

% rated lamp life vs. % of initial lamps which survive A life expectancy curve for incandescent lamps
1. The average life of a lamp of a given type, as determined from a large sample operated under laboratory conditions; the average life of a group of lamps which are operated under variable conditions may not equal the rated lamp life.
2. For lamp types whose luminous output drops to a very low value before the lamps cease to operate: the time when the output of a large sample of lamps under controlled laboratory conditions reaches a specified fraction of the initial output.
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When you group relamp, you're aiming to replace lamps at around 70 to 80% of rated lamp life.
9, Average Life 25000 Hrs 3Yrs , Cri-Minimum 70, Lumen Maintenance- Maximum 10 Percent At 25 Percent Of Rated Lamp Life Max Duration 6000 Hrs , Rated Luminous Flux-Min 710 Lumen, Safety Requirement- Lamp Shall Meet All Safety Requirements As Per Is: 16102 Part-I And Performance Requirement As Per Is: 16102 Part-Ii .
In a group relamping program, all fixtures are cleaned and relamped at once, based on the predictable rated lamp life, just prior to the steep end of the failure curve.
Advantages for plant researchers over existing T12 and T5 fluorescent systems include energy savings up to 70 and 50 percent, respectively, greater average PPF tailored to the photosynthetic action spectrum, improved horizontal and vertical light uniformity, a dimmable ballast to adjust PPF output to 50 percent of maximum without uniformity or spectral degradation, and a 30,000-hour rated lamp life.
Each of the four fields that met this criterion had been operated for less than 900 hours, which is less than 30 percent of rated lamp life.
We support the IES recommended practice of designing lighting systems to meet the mean target illuminance at 70 percent of rated lamp life, and also to group relamp when that time-of-use has been reached.
Inspire offers high performance optics, wide uniform coverage and 50,000-plus hours of rated lamp life in a compact housing.
Rated Lamp Life The 7-watt LED lamps have a 20,000-hour rated life to 70 percent of initial light output.
Half of the lamps in a sample are likely to fail before the rated lamp life, and half are likely to survive beyond the rated lamp life.