pxt-calliope/docs/reference/input/light-level.md

Light Level

Gets the light level from 0 (dark) to 255 (bright). The light is measured by using various LEDs from the screen.

This function will return 0 on the first call to this method, a light reading will be available after the display has activated the light sensor for the first time.

input.lightLevel();

Returns

• Number - light level from 0 (dark) to 255 (bright).

Example: chart light level

Use plot bar chart to visual the influence of various light source on the light level.

basic.forever(() => {
    led.plotBarGraph(input.lightLevel(), 255)
})

Lessons

See also

acceleration, compass-heading