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<p>[QUOTE="-jeffB, post: 4295739, member: 27832"]I'm skeptical about these LED devices.</p><p><br /></p><p>UV-C is the kind of UV that's most effective for disinfecting. UV-C LEDs are still very new, not very powerful, and <b>VERY</b> expensive. If you're seeing an LED wand for under $100, and probably under $1000, it's not UV-C.</p><p><br /></p><p>There are cheaper wands that use mercury-vapor lights to produce UV-C. Those will work, but have a limited lifespan -- the bulbs don't last nearly as long if they're turned on and off frequently. The bulbs are <i>supposed</i> to have lifetimes in the thousands of hours, but if you turn them on for a minute or so at a time, many times per day, they'll lose significant power after <i>tens</i> of hours.</p><p><br /></p><p>UV-A and UV-B LEDs have gotten cheaper and more powerful, and these longer wavelengths <i>can</i> sterilize things, but MUCH, MUCH more slowly than UV-C. (Several hours instead of tens of seconds, I'd guess.)</p><p><br /></p><p>It'd be easy enough to test, though -- get some mold started on bread, break it in half, zap one half with the wand, see what happens...[/QUOTE]</p><p><br /></p>
[QUOTE="-jeffB, post: 4295739, member: 27832"]I'm skeptical about these LED devices. UV-C is the kind of UV that's most effective for disinfecting. UV-C LEDs are still very new, not very powerful, and [B]VERY[/B] expensive. If you're seeing an LED wand for under $100, and probably under $1000, it's not UV-C. There are cheaper wands that use mercury-vapor lights to produce UV-C. Those will work, but have a limited lifespan -- the bulbs don't last nearly as long if they're turned on and off frequently. The bulbs are [I]supposed[/I] to have lifetimes in the thousands of hours, but if you turn them on for a minute or so at a time, many times per day, they'll lose significant power after [I]tens[/I] of hours. UV-A and UV-B LEDs have gotten cheaper and more powerful, and these longer wavelengths [I]can[/I] sterilize things, but MUCH, MUCH more slowly than UV-C. (Several hours instead of tens of seconds, I'd guess.) It'd be easy enough to test, though -- get some mold started on bread, break it in half, zap one half with the wand, see what happens...[/QUOTE]
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