[O] format-time-string for a time range

[Joon Ro]

Hi,

I'm trying to specify org-time-stamp-custom-formats for a time range. For example,

[2016-05-10 Tue 13:00-16:00]

Is there any way to specify this? Currently I'm using ("<%b %d (%a)>" . "<%b %d (%a) %I:%M%p>"), which results in May 10 (Tue) 01:00PM. 

I have not been able to find symbols for the end time for the range (in this example, 16:00).

Thank you,

Joon