LED`s produce more light per watt than incandescent bulbs this in it self is one of the most important aspect of LED´s witch is useful in battery powered or energy-saving devices.
LEDs can emit light of any required color without the use of filters that other light sources require. This is very efficient and can lower initial costs of a lighting solution.
The solid package of the LED will either focus the light into a beam or spread it out. Incandescent and fluorescent light sources require an external reflector to collect light and focus it in a usable way.

LEDs do not change their color tint as the current passing through them is lowered, witch happens when used in applications where dimming is required. Incandescent lamps turn yellow when dimmed.
In applications where frequent on-off cycling is required LED´s surpass all other light sources. Fluorescent lamps burn out more quickly when on-off cycled frequently and HID lamps require a long time before they restart.


LEDs, being solid state components, are difficult to damage with external shock where as Fluorescent and incandescent bulbs are easily broken if dropped on the ground or other wise shocked.
LEDs can have a relatively long useful life. One report estimates 35,000 to 50,000 hours of useful life, though time to complete failure may be longer some manufacturers actually promise 100.000 hours. Fluorescent tubes typically are rated at about 30,000 hours, and incandescent light bulbs at 1,000–2,000 hours. These walues wary allot between manufacturers
LEDs mostly fail by dimming over time, rather than the abrupt burn-out of incandescent bulbs.
LEDs light up very quickly. A typical red indicator LED will achieve full brightness in microseconds; Philips Lumileds technical datasheet DS23 for the Luxeon Star states “less than 100ns.” LEDs used in communications devices can have even faster response times.
LEDs can be very small and are easily populated onto printed circuit boards.
LEDs do not contain mercury, unlike compact fluorescent lamps.
LEDs are produced in an array of shapes and sizes. The 5 mm cylindrical package is the most common, estimating the percentages is quite hard due to changes happening on the market and technological advances. The color of the plastic lens is often the same as the actual color of light emitted, but not always. For instance, purple plastic is often used for infrared LEDs, and most blue devices have clear housings. There are also LEDs in extremely tiny packages, such as those found on blinkies and on cell phone keypads.