如何在数据库中保存复选框数组?

I have this form:

我有这种形式:

    <tr>
   <td><input type="hidden" name="ledlamps" value="LED lamps">LED lamps:</td>
   <td><input class="field checkbox" type="checkbox" name="box[]" value="3mm"/><label class="choice">3mm</label></td>
   <td><input class="field checkbox" type="checkbox" name="box[]" value="5mm"/><label class="choice">5mm</label></td>
   <td><input class="field checkbox" type="checkbox" name="box[]" value="8mm"/><label class="choice">8mm</label></td>
   <td><input class="field checkbox" type="checkbox" name="box[]" value="10mm"/><label class="choice">10mm</label></td>
   <td><input class="field checkbox" type="checkbox" name="box[]" value="Ovals"/><label class="choice">Ovals</label></td>
   <td><input class="field checkbox" type="checkbox" name="box[]" value="Assembly LEDs"/><label class="choice">Assembly LEDs</label></td>
  </tr>
    <tr>
   <td><