如何将HTML5时间属性输入保存到My SQL

Hi I have a problem with HTML5 time attribute.

My code looks like this,

 <input type="time" name="e_time">

the sample output is looks like this

[e_time] => 19:08

It gives an array in 24 hours format. But the problem is My SQL is not accepting this in "time " data type. How do I do this? I tried adding

$time2 = $_POST["e_time"] . ":00";

and added :00 for the end of the string but it still fails. can anyone suggest me how to solve this? Thanks!