LED modified rear insert for Halo Helmet
Note this part has now been added directly to base model Size A Helmet - consider this thing deprecated.
This is a LED mount for the rear insert in this full size A Halo Helmet.
http://www.thingiverse.com/thing:158120
This insert takes two 5mm Leds into the bottom of the piece.
The body is deeper to take the leds and diffuse the light slightly.