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Benefits of LED lighting

Energy Efficient
LEDs are much more efficient than HID and can be 50 to 70% more efficient than HID.
This can mean significant savings on your power bill.

Lifetime
HID lamps have a much shorter lifetime than LEDs. HID lamps are rated in average rated life,
which means after a certain number of burn hours, half of the lamps have burned out. A typical average
life rating for HID lamps is between 10,000 and 24,000 hours. LEDs are rated in average useful life. That
typically means when 30% of the light has depreciated, however the LEDs are still burning. We refer to
this as L70 which can be as high as 100,000 hours.

Instant On
HID lamps require a warm-up period before getting to full brightness. This can take several
minutes. LEDs are instant on to full brightness, no warm-up needed.

Restrike Time
lf there is a power interruption, HID lamps require a cool-down period from
approximately 4 to 20 minutes before they will restrike and come back on. LEDs instantly restrike,
no cool down needed.

Vibration
HID lamps have an arc tube that can break and/or burn out prematurely due to
vibration. LEDs are rugged and resistant to this type environment. An application example would
be a parking deck.

Lamp Lumen Depreciation
The depreciation of light output (lumens) from HID lamps falls off
quickly compared to LEDs. For instance, a 20,000-lumen metal halide 40OW lamp, the Iight output
depreciates as much as 35% during the first 6,000 hours of operation. During this same burn time,
LEDs have lost little if any light output.

Hazardous Waste 
HID lamps contain mercury which must be disposed of properly. LEDs have
no mercury.

Delivered Light Percentage
Up to 40o/o of the lumens from an HID lamp can be trapped in the
fixture and never reach the task area such as a street or parking lot. LEDs use a different system
and deliver I O0o/o of their lumens out of the fixture which results in more usable light at the task.

Color Shift
HID metal halide lamps shift in color as the lamp ages. What begins as white light ofren
shifts to a tint of pink or green. LEDs maintain their color consistency and have minimal shift over
their entire life.

Dimming
LEDs can be dimmed easily and dimming will increase LED system life. HID dimming is
not done often because it is difficult, limited and expensive.

Summary
For all the reasons above, LED lighting is the choice today over HID lighting. HID is
considered by most today to be obsolete technology. lt just makes good business sense to use
high-quality LED lighting.