What do the color bubbles mean?

  <p>When viewing a list of products, the color bubble that appears in each row      denotes how many units for that products are currently in stock.</p>      <table align="center">        <tbody><tr><td><img src="images/framework/RedLight_ffffff.png"></td>            <td>Red denotes a product which is out of stock</td></tr>        <tr><td><img src="images/framework/YellowLight_ffffff.png"></td>            <td>Yellow denotes a product which has only 20 or fewer units left in stock</td></tr>        <tr><td><img src="images/framework/GreenLight_ffffff.png"></td>            <td>Green denotes a product with more than 20 units in stock</td></tr>      </tbody></table>      <p/><p>If you rest your mouse over a color bubble an info box will appear showing      the precise number of units in stock for that product.</p><br>      <hr>      <p class="center">SparkFun Electronics</p><p align="right"><a href="javascript:history.go(-1);" class="ecom"><input onclick="javascript:location.href='javascript:history.go(-1);'" src="images/framework/button_back.gif" alt="Back" type="image"></a></p>