Use natural light during the day

Why? Increase the amount of natural light that enters your home to reduce your need for artificial lighting. By opening shutters, horizontal blinds, and skylights, you can naturally light your home to save energy and lower your lighting costs.
How it works: Using indirect sunlight reduces your need for artificial lighting while minimizing heat gain and glare.

Step by step:
  • Maximize indirect sunlight to bring in natural lighting without raising temperatures inside your home.To do this, angle shutters or horizontal blinds so sunlight bounces off of them and on to the room's ceiling.
  • Improve light penetration by painting interior surfaces (especially the ceiling) with light colors.
  • Consider adding skylights. Talk to a building contractor about where skylights would make sense in your home. Look for ENERGY STAR® certified models.


Good to know: North-facing windows admit relatively even, natural light, produce little glare, and almost no unwanted summer heat gain. Windows that face east and west provide good daylight penetration in the morning and evening, but may cause glare and let in a lot of heat.

If you're constructing a new house, consider natural light as part of your whole-house design—an approach for building an energy-efficient home.

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