# Light Meter


***Light Meter*** is a visual debugging tool used to simplify lighting adjustment. Open it via the *[Rendering Debug](../../editor2/rendering_debug/index.md) -> Light Meter* and you�ll see illuminance distribution for all surfaces in the scene as a color gradient from zero to the maximum level.


> **Notice:** To learn how to use the tool, watch [this video tutorial](#video_tutorial).


So, to set up lighting for a room with a maximum light level of 350 lux, set the corresponding value with the *Maximum Lux Value* slider and simply adjust light sources, so that most of the surfaces become painted evenly from blue to red and white. Recommended lighting levels are provided for quick reference.


![](light_meter.gif)


## Video Tutorial


Watch the video below to learn how to work with the *Light Meter* tool.