TABLE 2. Calculated TTSB Values and Data Provided by the National Weather Service.
| UV index | Skin Type | Environment | SPF Level | TTSB (minutes) | National weather service (minutes) | |
|---|---|---|---|---|---|---|
| Case 1 | 3 | Light Skin | Snow | 10 | 39 | 35–45 |
| Case 2 | 9 | Medium Light Skin | Cloud | None | 22 | 18–28 |
| Case 3 | 5 | Fair light Skin | Water (sailing) | 30 | 58 | 50–60 |
| Case 4 | 2 | Medium Dark Skin | Sand | None | 104 | 100–110 |
| Case 5 | 8 | Dark skin | Grass (park) | 15 | 128 | 125–135 |
| Case 6 | 7 | Light Skin | Building (city) | 20 | 46 | 40–50 |
| Case 7 | 6 | Deep Dark skin | Sand | 5 | 75 | 70–80 |
| Case 8 | 1 | Fair light Skin | Snow | 40 | 303 | 300–310 |
| Case 9 | 4 | Dark skin | Cloud | None | 95 | 90–100 |
| Case 10 | 10 | Light Skin | Building (city) | 25 | 35 | 30–40 |