These are a popular choice now Emma. Very cheap to buy (& bulbs dirt cheap and very reliable) They give a nice wide basking zone too.
Only thing is you have to attach your own wire & plug! I brought some... But am still waiting for hubby to do so!
In the meantime (claptomaniac here!) has shelves, full of P30's. They were still selling them reasonably on ebay until recently.
https://imgur.com/a/kjO0IQg