4 Ways of Looking at a Lamp

By Julie Mihaly
It lights up a room, but that's not all.
From Reader's Digest
SmartWater, a new security system comfines liquid and light.
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Geoff Caddick/PA Wire/AP Images

As a guilt detector
If you've got sticky fingers, stay away from cops bearing lamps. SmartWater, a new security system that combines liquid and light, has proved useful to banks, museums, and corporations in England and is now alighting on our shores. How it works: Clients are assigned a chemically coded liquid that's released if a would-be thief gets too close to any protected items. The liquid leaves a residue that can be detected on skin for up to eight weeks under a handheld UV light, which is supplied to police by the company.

New defense arguments—"I was just looking around for my safe-deposit box!"—coming soon.
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