Safe time by skin type
Skin type
No sunscreen
SPF 30
SPF 50
Type I
Very fair, always burns
6m
32m
42m
Type II
Fair, usually burns
9m
48m
1h 2m
Type III
Medium, sometimes burns
18m
1h 37m
2h 5m
Type IV
Olive, rarely burns
27m
2h 29m
3h 12m
Type V
Brown, very rarely burns
35m
3h 13m
4h 9m
Sea level, on land, UV held at 10. Sunscreen is counted the way most people apply it (about half the tested amount, roughly the square root of the SPF). Whatever the table says, reapply at least every 2 hours. Snow, sand and water reflect UV and shorten these times. Not medical advice.
What to do at UV 10
Avoid the midday sun. Shade, clothing, a hat, sunglasses and SPF 50 sunscreen; fair skin can burn in under 20 minutes.
Get a time for your skin, right now
Daisy reads the live UV where you are, follows how it changes through the day, and counts down your safe time for your skin type and sunscreen.
Open DaisyDaisy on your phone
Scan to open Daisy on your phone. The iPhone and Android apps, with a lock-screen countdown and a real alarm, are on their way.
Other UV levels