haha i dont know about a lamp without a plug.
but i have two different UVB bulbs.
the first one is a 24 inch, 20 watt 5.0 UVB reptisun. (
http://www.drsfostersmith.com/images/Ca ... 16DZIO.jpg)
it works perfectly fine, but you are very limited on how you can place it overhead, and the hood lamp is kind of pricey, as well with the bulb itself. the product itself is fine but make sure it is at least 8" from the basking area (its been known to cause problems)
my other one, which i prefer as i think many would agree, is a 26 watt 5.0 (
http://www.arcatapet.com/fullsize/12516.jpg) UVB repti glo. this is can be placed in a specific mini hood lamp (which is kind of pricey) or in a regular clamp lamp provided by fluker (or any other brand). one problem with being put in a clamp lamp is that the bulb sticks out of the lamp instead of like a regular bulb. this makes the bulb shine REALLY bright if its not point directly downward or away from active areas.
i dont know if you know what the 2.0, 5.0, or 10.0 mean in front of the word UVB on the boxes, but it means the percentage of UVB output by that bulb. 2.0 is not strong enough for turtles and 10.0 is too strong. they even have turtles on the 5.0 reptisun boxes for i guess "turtle safe" but i could be wrong.
hope this helps!