The table below gives an indication of the importance of the different UV indices: 

 <br>

 <br>

 <table border="black">

   <colgroup>

   <col width="100">

   <col width="100">

   <col width="400">

   </colgroup>

   <tr>

     <th align="center" bgcolor="#E0E0E0">UV-Index</th>

     <th align="center" bgcolor="#E0E0E0">Evaluation</th>

     <th align="center" bgcolor="#E0E0E0">Protection</th>

   </tr>

   <tr>

     <td align="center" bgcolor="#00B000">0 – 2</td>

     <td align="center" bgcolor="#00B000">low</td>

     <td style="padding-left:25px;"> No protection required</td>

   </tr>

   <tr>

     <td align="center" bgcolor="#FFFF00">3 – 5</td>

     <td align="center" bgcolor="#FFFF00">moderate</td>

     <td style="padding-left:25px;">Protection required: hat, T-shirt, sunglasses, sunscreen</td>

   </tr>

   <tr>

     <td align="center" bgcolor="#F87820">6 – 7</td>

     <td align="center" bgcolor="#F87820">high</td>

     <td style="padding-left:25px;">Protection required: hat, T-shirt, sunglasses, sunscreen</td>

   </tr>

   <tr>

     <td align="center" bgcolor="#FF0000">8 – 10</td>

     <td align="center" bgcolor="#FF0000">very high</td>

     <td style="padding-left:25px;">additional protection required: avoid staying outside if possible</td>

   </tr>

   <tr>

     <td align="center" bgcolor="#7F00FF">≥ 11</td>

     <td align="center" bgcolor="#7F00FF">extreme</td>

     <td style="padding-left:25px;">additional protection required: avoid staying outside if possible</td>

   </tr>

 </table>

 <h6>Source: <a href="https://www.bag.admin.ch/bag/de/home/gesund-leben/umwelt-und-gesundheit/strahlung-radioaktivitaet-schall/elektromagnetische-felder-emf-uv-laser-licht/sonne_uv-strahlung/uv-index.html">

             Schweizerisches Bundesamt für Gesundheit</a></h6>