Replacement LED for a 5v 3C Work light?

[Dave Huck]

I just found an old Eveready work lamp that takes a GE1651 5V 0.6A 15mm bayonet lamp. It's a cheap plastic torch but it has a retractable hook for hanging and I plan on using it for my loft. Ideally I'd like to run it with 3 Lithium AA's in C-AA adapters and a replacement LED bulb.

Does anybody know if there's a safe (not too hot) replacement LED for the GE1651 please?

Cheers

Dave