I need to replace one of the Halogen lite bulbs and I don't see any philips screws or flat head screws in the back of the lite case ... how do I get at the halogen bulb to replace it ? I called Bike Bike and they told me to try this or try that

I see a seam on the face of the 3 1/2 inch lite and I don't want to try and pry it off ... How do I get the bulb ?