A light bulb emits radiation even outside the visible band, generally in the infrared and ultraviolet, which does not contribute to the sensation of brightness. A lamp has a higher luminous efficiency the more it is able to emit a spectrum suitable for human perception.

Currently the LEDs have a luminous efficiency up to 120 lm/W, compared to 13 lm/W of incandescent lamps. It does not pollute and does not contain hazardous substances
The LED contains silicon dust, does not contain gases harmful to health and has no toxic substances, unlike fluorescent and discharge lamps (metal halides and sodium vapors).

Total absence of light pollution; the LED shines, but does not saturate the environment. Zero emissions are U.V. (ultraviolet) that in general are harmful to humans for long exposures over time. I.R.-ray emissions are also zero. (infrared radiation), harmful to the eyes due to direct exposures.

These emissions are also very harmful for the textile and leather trade, materials which are very sensitive to U.V. Loss of color brilliance and sclerosis of materials, particularly natural and therefore more valuable ones, are often the inevitable consequence of long exposure to artificial light: another reason to use LEDs in the lighting of commercial premises.

The LEDs generate heat, but keep it inside, in fact the casing is able to control the heat generated and to dispose of it to external heat sinks. The power used is thus best used for lighting, optimizing efficiency thanks to Home Electrical Installation. The average temperature is rarely above 50 °. The LEDs can therefore be installed in contact with wood, plastic, and all those materials that fear excessive heat.

Considerable savings can be made in air-conditioning a very bright environment: in fact an incandescent produces a considerable amount of heat dispersed in ‘environment and normally, when performing the calculations for the design of an air conditioning system, it is considered as a source of heat to be removed of about 75 W. The equivalent source of light, but LED, it is evaluated with a redundant margin of about 15 W as shown by Home Electrical Installation experts.

The maintenance costs of LED lighting apparatuses are estimated in the order of a hundredth compared the sodium facilities currently in use, then practically nil. The types of LEDs on the market are compatible with existing power dimensions/attacks/voltages: simply unscrew and screw, remove and insert in place of the other lamps.

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