LED Motorcycle Helmet

For the design part of my art folio am creating a futuristic helmet. I want to put green led strips on the inside of the visor. The helmet won't need to be powered for long maybe and hour at the most. It will need to be worn for a few photos, so I can't have huge battries and switches , I need to make this as compact and hidden even if the wire just runs down my neck and the batteries in my back pocket. I have the helmet but no idea how am going to do the rest so could someone please give me a non technological person who only knows that battries have power give me a guide to making this , and hopefully as cheap as possible . I already have the helmet.

Look up Daft Punk helmet in the Instructables search. You should find several projects that incorporate a bunch of LEDs into helmets.