Advantages of HIF lighting over HID lighting are:
Instant start-up and
re-strike
HIF lighting achieves full
output almost immediately. A typical HID can take anywhere from 6 to
15 minutes to achieve full light output. Some building owners and
managers leave HID lights on during unoccupied periods to avoid
waiting for the lights to re-energize
More control options
Because of instant re-strike, HIF lamps lend
themselves to more control options. Some HIF fixtures have built-in
occupancy sensor controls, multi-level switching, and true variable
dimming with output proportional to energy consumption. HID lights also
can dim, but at 30 percent light output they still use 50 percent of
their total energy consumption.
Longer lamp life
Most HIF lamps are rated at 20,000 hours, with some premium HIF lamps
rated at 24,000 hours. Using programmed-start ballasts can extend the
lamp life even beyond 24,000 hours. Most HID lamps are rated between
10,000 and 20,000 hours.
Increased lighting efficiency
HIF lamps have about a 2-to-1 efficacy
improvement over HID lights when considering the
average lamp lumen output. This means that they
provide the same lumen output for one-half the wattage.
Lower lumen depreciation
The newer HIF T5 and T8 lamps only lose about 5 percent of their original
lumen output over time. HID lamps lose about 33 percent of their
original light output.
Improved Color Rendering Index (CRI)
The newer HIF T5 and T8 lamps have
a CRI between 80 and 86 compared to a CRI
of 65 to 70 for HID lamps. HIF lamps have less color shift than the
older HID lamps.
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