Are there battery powered LED lights?

I am doing a costume for a convention where I will be dressing as one of the Sirens from Tron: Legacy. For the glowing effects, I was thinking of wearing led lights. Glueing a strip onto the cotton bodysuit, hiding the wires, and using a battery to power them. Is that possible? Are their battery operated led... show more I am doing a costume for a convention where I will be dressing as one of the Sirens from Tron: Legacy. For the glowing effects, I was thinking of wearing led lights. Glueing a strip onto the cotton bodysuit, hiding the wires, and using a battery to power them. Is that possible? Are their battery operated led lights? where could I get them?
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