Practical LED Bulb Purchase Advice

Practical LED Bulb Purchase Advice

1. The luminous flux

This is the first important parameter of all luminaires, and the standard definition is "The amount of radiation flux derived from the evaluation of the standard human visual properties of international regulations". For luminaires, this parameter is "The total amount of visible light emitted by the luminaire per unit time". Unit: Lumen, symbol lm. For led lights practical led bulb of the same type, this parameter must exceed the minimum value (pit), and the higher the better. (note that the led durable led bulb can have serious dazzle light too bright, eyes will be uncomfortable) real parameter in determining the quality of lighting illumination - "Accept the visible light flux on unit area", the limitation of working backward from the parameter limit luminous flux, is more complex, need to consider the types of light, the light distribution curve, installation environment, height and so on, the pit is not filled out. Here is a rough reference value, standard incandescent lamp (no lampshade, standard light distribution), required to read the manual (0.75m distance about 300lx, led lamp durable led bulb effective lighting area diameter 1.8 m), 900lm required.

2.Power Of

As long as the light flux meets the demand, the less power the led lamp durable led bulb, the better. (if the heat dissipation of high-power lamps is not handled well, it will seriously reduce the life of lamps) this parameter is generally marked, and sales staff also use him to distinguish the "Brightness" Of lamps. This parameter is second only in importance to light flux.

3. Life

The life of the lamp actually has two parts, taking the shorter time as the life of the whole lamp 1, the time needed for the light flux of the whole lamp to reduce to 70% of the initial value 2, the time from lighting to burning of the whole lamp for led lamps, the second time is far shorter than the first time. The often claimed led life of 5w-10w hours refers to the first life time, and the long service life led bulb led chip alone can be used for much longer under normal conditions. The second test is the manufacturer's led driving ability and heat dissipation design ability. Purchase advice: Choose reliable led long service life led bulb and other brand manufacturers, the longer the better life.

4. Dimming performance

Led drivers can have a lot of playability, and there are many lamps on the market that claim to adjust brightness, color temperature, color, and more. All kinds of wifi, bluetooth and other adjusted led lamps durable led bulbs are toys with 5-minute freshness, which cannot be used for lighting and are expensive, so it is not recommended to buy them. Traditional dimmer led lamps practical led bulb, dimmer matching problem, also not recommended to buy.