How much sunlight is needed?

Related questions

1. Is the sun absorption spectrum?
2. Why is sunlight important for life?
3. What is natural sunlight?
4. Do UV lamps cause cancer?
5. What are the 3 types of spectra?
6. How do you make indirect sunlight?
7. Is pure water blue?
8. Can plants grow without sunlight?
9. Do plants need sunlight?
10. Where is sunlight on the electromagnetic spectrum?

Tags

1. #exposure
2. #people
3. #minutes
4. #vitamin
5. #little
6. #enough
7. #sensitive
8. #depend
9. #darker
10. #sunlight
11. #times
12. #several
13. #healthy
14. #should
15. #blood
16. #natural
17. #midday
18. #levels
19. #regular
20. #maintain