My russian tortoise only eats brocolli!!!

[Alex and the Redfoot]

i meant like does it have to be a tube one or is a round one okay?

Yes. Tube UVB lamps are easier to set up properly, last longer than coil or mercury vapour bulbs and provide good and even UVB coverage. I wouldn't insist on T5 tubes if there were decent alternatives.

 

[Alex and the Redfoot]

i meant like does it have to be a tube one or is a round one okay?

But this dome fixture can be used for the basking zone (a combination of a basking lamp and ceramic heat emitter or basking lamp and LED ambient bulb).
If your room is 65-70F in the coldest months - you won't need ambiebt heating (ceramic heat emitters). If you can keep you tortoise outside (or sunbath) most time of the year and brumate it in winter - you won't need a UVB lamp. But you will need a spare fridge