LED lights are on the consumer market for about 2 years. In the jungle of the referenced products, it is good to know cherry pick the models offered based on simple selection criteria.
According to Philips, the way one behaves LED is: the power goes down slowly to half of his life and then fall sharply. It stabilizes thereafter and reached a plateau where it will once again decline slowly until his death. This scheme is valid for LED high and low power.
Xanlite opposes this scheme and indicates that the largest light losses occur in the first 2000 hours. After the flow is stabilized until the end of his life. Other elements may be involved in reducing the light output. The optical filter that is opaque in one example.
Regarding warranties, manufacturers offer between 1 and 3 years on their lamps. Econergyworld is positioned to 3 years while Philips remains at 2 years. It intends, however, to reassess its security in the future to extend its duration, once they have more return on their products. Xanlite warrants its LED lamps 48 1 year. Beyond this period, requests are handled case by case and are very rare with the manufacturer claims.
Fewer LEDs in a light bulb is better?
Philips and Econergyworld think it is better to focus a light bulb with 5 LED 50 LED rather than for the same power. Philips, LEDs with high power (greater than 2 watts per LED) have a longer life. They manage to keep 70% of their power at end of life, where those with low power fall to 20%.
Xanlite tempers this view. From the moment an LED, high or low power, is used in normal conditions, it will have the same lifetime and brightness at end of life. You will however reduce these two factors if you push the LED from their initial characteristics. For example, to obtain higher brightness. Choose materials and cooling system Inside an LED lamp, it is necessary to use a cooling system based on materials such as aluminum (for its properties of thermal conductivity) closest to the heat source to bring then to the outside where it can be dissipated via a fin system (see photo).
These can also be made of plastic and hidden inside (you can see by looking from above). Philips and Econergyworld bulbs, among others, feature in. Conversely, for its 48 bulb LED low power consumption, Xanlite chose not to include fin. The reason: the bulb does not heat up enough to need it. Choose a product with an optical grating.
Look at the lamp surface coating type. In the picture, you see that the surface is not smooth. Each LED has, above, deformation of the surface that allows to disperse the light evenly. This avoids having a directional light. Manufacturers offer their range of variable projection cones. Check out these specifications.
In the case of through-LED (pictured at the top of the article), it is the shape of the envelope of the LED that will give its projection angle. If it is dome-shaped, the angle will be opened. If it is a cylinder, the angle will be very close.