Book 13, Question 140
Why Do Window Blinds Control How Much Light Comes In?
Window blinds control light with slats that can tilt up, down, or close! Tilting the slats changes where the light goes and how much comes in. That lets you make a room brighter or dimmer.
More fun facts
- Using windows and skylights for natural light is called daylighting.
- Daylighting can save money on lights and heating for homes and businesses.
- Blinds and other window controls help manage glare and heat from the Sun.
- Some new windows darken by themselves in bright sun, like giant sunglasses.
- Glare and heat are easiest to control on north and south facing windows.
Sources: U.S. Department of Energy, U.S. Department of Energy, NIST
Questions kids ask
Can blinds save energy?
Yes. Controlling sunlight can cut the need for lights and cooling.