A lamp is a lamp, is a lamp... Just try to stay within the wattage the socket is rated for.
If you can use the lamp over your enclosure, it should be fine. Of course, I'm assuming you mean a regular lamp, rather than a fluorescent. If at all possible, you should be using a fluorescent tube for UV rather than a spiral compact. Also, if the desk lamp has no reflector, you are going to want something to keep the light from shining into your eyes when you look at the tank.
As for "reptile" lamps, buying a clamp lamp from the pet store is just throwing money away. They have the same kind at Walmart for much less. Walmart carries one with a ceramic socket and one with a metal socket. Both are appropriate for the UV light and heat lights. Do not ever use any lamp with a plastic socket for either one (CFL bulbs get very hot at the base).
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0.1.0 cats: Soot
0.1.0 Polypedates leucomystax: Joe
0.0.1 Taricha granulosa: Saphira
0.1.0 Physignathus cocincinus: Rikutu
0.1.0 Miniature Schnauzer: Sasha
1.0.0 Python regius: Graham
1.0.0 Pogona vitticeps: Franky
0.0.2 Ambystoma macrodactylum
1.1.0 Japalura splendida
1.0.2 Pseudacris regilla
RIP 1.0.0 Elaphe guttata: Masquerade
1.1.0 Bombina orientalis: Starvin' Marvin & Aphrodite
Available for sale/adoption:
1.1.0 parakeets
2.3.0 ADULT Rattus norvegicus - four B&W hoods, one champagne hood
4.2.0 BABY Rattus norvegicus - four champagne hoods, two blue hoods
Fear the Mod? HA! Now you must cower in your boots before the almighty ADMIN!!! (all in fun, of course! lmao)
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