Solitaire Maglite do a pencil torch which is light enough (Ha!) and small enough to hold in your mouth. It was invaluable when I rebuilt my MGB for under-dash work.
http://www.ebay.co.uk/bhp/maglite-solitaire


DaveW
'05 Red Roadster S1
'16 Yellow (Not the only) Narrow AR GDI Plus 4