t5 vs pc

[Don E]

Hi- sorry if this is a common question- the forum won't let me search using the terms "T5" or "PC" grrr.

Anyway- I'm looking to light a 20g tall. I used to use a coralife 2x65 pc unit, and was happy with it- but people tell me t5's are cheaper and cooler.

What I'm confused about is the equivalent wattage. What kind of t5 setup would I need to approximate the lighting I used to get with the 2x65 PC unit?

Thanks, all

don
(back in Victoria again)