Strobes for idiots - tg5

[Pegz2]

Hi all,
I am currently shooting with an olympus tg5 in a seafrogs housing with two video lights, based in the UK.
I am wanting to buy a 2nd hand strobe (budget reasons) for an upcoming trip. I am totally confused on what exactly I need to make it work.
There seems to be a few different TTL strobes on ebay, would this work? I have never had hands on a strobe never mind shot with one, so I am struggling to make sense of it in an abstract concept.
Is there any chance anyone has a good resource please for what will work for this housing/camera on a budget please? Or even better, is looking to sell one of their own.
Thank you!

 

[hedonist222]

It depends on whether you want to shoot macro or wide.

For the latter, buy the highest GN (power) flash you can afford.

For the former, something compact with suffice seeing as you don't need very much power for closer subjects.

Look for clamps and arms to mate your housing to the strobe.