Low maintenance
The long lifetime of LEDs reduces the need to replace failed lamps, and this can lead to significant savings, particularly in the cost of sending out maintenance crews. This also makes LED fixtures useful for installation in relatively inaccessible locations. White LEDs with efficacies of 25 lm/W and up are commercially available, exceeding the performance of incandescent and some
fluorescent sources. The directional nature of light produced by LEDs allows the design of luminaires with higher overall efficiency. Low power consumption
The low power consumption of LEDs leads to significant energy savings that can often drive the installation of LED-based systems, for example traffic signals. National programs to develop effective solid-state lighting industries in the US and Japan have been driven by the potential energy savings associated with using LEDs. Brightness
Although LEDs have high efficiency and consume a small amount of power, the devices produce a small total number of lumens. For example, a 60 W incandescent bulb with an efficiency of 20 lm/W produces 1200 lumens. A one-watt LED with an efficiency of 30 lm/W produces only 30 lumens i.e. 40 such LEDs are required to produce the same amount of light as the incandescent bulb. Heat
LEDs don't produce heat in the form of infrared radiation, which makes incandescent bulbs hot to the touch. The absence of IR radiation allows LED fixtures to be positioned in locations where heating from conventional sources would cause a particular problem e.g. illuminating food or textiles.
