10-20 lumens: for close tasks (eg map reading).Here is our overview of the number of lumens with an example: But how do you know how many lumens you need? The amount of lumens depends on what activity you're going to be doing. So, lumens indicate the brightness of the light. So they use fewer watts, but they shine brighter. And bulbs are becoming ever more energy efficient. This means you can't say that a 200-lumen LED bulb consumes a certain number of watts. But with LED bulbs, wattage and brightness are not so closely related. This was a convenient way to estimate the brightness of a light bulb. Wattage indicates the lamp's energy consumption. What is the difference between lumens and watts? Before there were LED lamps, wattage was often mentioned. With modern flashlights you nearly always see lumens, but (almost) never the wattage. Why don't you see the number of watts anywhere? Of course, be sensible and don't just shine your lamp in someone's eyes. But you don't have to worry about whether such a bright lamp is allowed. These days you see lights becoming brighter, and that trend will continue. The great thing about this is that you can easily compare lamps that have an ANSI lumen indication, because the number of lumens is measured in exactly the same way for both lamps. It is an American standard for measuring the number of lumens. ANSI stands for American National Standards Institute. You may have also come across ANSI lumens. Read more about a flashlight's range here. Fortunately, manufacturers always indicate how far the lamp shines. This is why you should always check carefully when you compare two lights.

A focused beam shines further than a wide beam. That depends on how the light is bundled. For this reason, the number of lumens doesn't say anything about how far the light shines. This is measured at the source of the light, i.e.

Lumens tell you how much light comes out of a lamp.

Lumens to candela