Safe time by skin type
Skin type
No sunscreen
SPF 30
SPF 50
Type I
Very fair, always burns
12m
1h 5m
1h 24m
Type II
Fair, usually burns
18m
1h 37m
2h 5m
Type III
Medium, sometimes burns
35m
3h 13m
4h 9m
Type IV
Olive, rarely burns
54m
4h 57m
6h 24m
Type V
Brown, very rarely burns
1h 11m
6h 26m
8h 19m
Sea level, on land, UV held at 5. 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 5
Seek shade around midday, wear a hat and sunglasses, and use SPF 30+ sunscreen.
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