My first response would also be No, but honestly I didn't know why I was saying that.
Go to this website:
http://www.reeflightinginfo.arvixe.com/select-one-lamp.php
watts 250
Manufactureer Giesemann
type double ended
Name Giesmann 250W Megachrome
Ballast PFO 250W HQI(M80)
Shielded N
Change the lower limit to 310nm
Upper limit to 850
Then you can see the nM plot of the bulbs I use on my tank.
UVA bulbs which from what I found are commonly used in Tanning beds run from 315 to 400 nanometers(nM).
Honestly I don't know the answer, but after looking into it a bit more I am interested.
Things to keep in mind.
Are tanning bulbs designed to run for 8 hours at a time?
How would you UV shield the bulbs?
Are there any UVB or C rays?
You would need to supplement with other lighting.
Anyways I'll just say 'I don't know' could be a yes or a no, but for the trouble and potential safty risks (loss of vision to you or your fish if not shielded properly) I wouldn't do it.
Very interesting question. May I ask why others said 'NO' just curious what some of the other reasons might be.
Brandon