Do Same Lumens Mean the Same Brightness for Projector?

The unit of projector brightness is lumens, so projectors with the same lumen value should have the same brightness! In fact, different brands of projector manufacturers have different environments for testing brightness indicators, and the final lumens values of the tested projectors will not be exactly the same. And more importantly, different light sources will also bring different brightness.

The general traditional bulb type projector uses UHP bulb, its lumen is not the same as the LED light source projector. Traditional bulb projectors generally use about 2000 hours and the brightness will decrease to about 50% of the initial value. At the same time, it must be noted that the light decay of traditional models is not only due to the aging of the bulb, but also includes reflectors, mirrors, and color wheels. After the aging of various optical links, even if the bulb is replaced, it is difficult to restore to more than 60% of the initial value.

In LED projectors, there are no such aging devices at all. Therefore, for a 3000-lumen bulb-type projector, the average “white point brightness” is around 1400 lumens, and the average “color brightness” is only 800 lumens; while an LED model, such as CoolEco S3, if the initial “white point brightness” is only 800 lumens “Brightness” is 1100 lumens, the average “white brightness” for 8000 hours is about 800 lumens, and the average “color brightness” is about 800 lumens; so the brightness of a 1200-lumen LED light source is about equal to a 3000-lumen UHP light source.