can you really whiten your teeth in a tanning bed?

When I was at the tanning salon I saw this ad for this gel that you apply to your teeth when you're tanning, does anyone know if this would really work?
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Most of the newer whitening systems are done by putting peroxide on your teeth and then they put it under a light (maybe a uv light similar to a tanning bed) to enhance/quicken the peroxide's effect. It is probably a peroxide gel and i think you'd put it on your teeth like you would at the dentist and instead of the light going only to your mouth for whitening it goes over your whole body so you are doing both at once. That is the only explanation I can think of. I think it would work, but is also dangerous. peroxide can damage your teeth if you use it too much and if you apply it wrong, it can really burn your gums. Also, the light is only going to hit that gel if you are smiling wide the whole time. If you don't have one of those mouth opener things that spreads your lips open, your mouth is gunna get veryyyyy tired. Plus with your mouth in the position, the way your face would wrinkle from smiling, would give you like a tan line where your wrinkle is folded, and then tanning light doesn't hit it. That's why they have the dentist do it. But if you are ok with that, i suppose it could work. Check the ad and see what the active ingredient is. Then maybe google that and see if one of it's uses is teeth whitening.
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