A cheap white LED bike lamp

From Jinx McScrooge's Rubbish Workshop
Materials used
$1 plastic encapsulation box with a window cut in it
Aluminium spray paint
Thin aluminium (cardboard or paper would do) sprayed with paint
Facetted plastic (offcut from a busted shower screen)
Perspex strip bent with hot air gun or hair dryer
White LED + 330 ohm resistor for 6V operation
Silicone sealer (or any other flexible glue, like PVC cement) to attach window
About 30 minutes total time to make
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