It's probably harder to get tickets as their home games have mostly been, if not all, sellouts. Tampa fans missed their hockey AND it's the time of year where there isn't much else going on to compete with hockey nights.
OP, if you've got a choice of games, I'd check for a deal on stubhub. If there's only one game you could get to - I'd buy direct.
If you go and are Lightning fans, please cheer extra loud for Killorn, Conacher, and Panik for me!!