Brightest White LED

[walid]

How do measure the Brightest White LED and see if it is damaged or not?
thanks

Note: I have tried to test in the same way as the normal LED, but did not give me any reading from both sides

[Hero999]

Brightness is only half the story: colour rendering index and beam angle are also important.

[audioguru]

Many cheap "bright" LEDs are for sale but they are simply a dim one in a case that focusses the light into a very narrow but bright beam.
Good LEDs have the same brightness or more and have a wide beam angle.

[Will D]

Hi,
The most accurate indicators of the brightness of LED bulbs are the measured lumens or lux. Lumens measure the total amount of light output from a bulb. Lux measures how bright the light is on a surface at a specified distance.

[audioguru]

My cheap solar garden lights are EXTREMELY bright at night if you look at them.
But they are not bright enough to light up anything nearby.

[plouf]

but its interesting on how do you actually can measure a LED light, if there is any more or less easy method with more or less accurancy

[walid]

In fact, no one understand my question. I do not ask about the intensity of light, my question was about how to examine it. And to know whether is good or bad? Thanks

[Hero999]

A light meter can be used to measure intensity.

A spectrum analyser can measure the power at different wavelengths.