I had a 33g tank with a 96w PC & 2 T5s & heat wasn't too much of an issue. You can always position a fan if you need to, which I had to in the summer, but that was when the temp in the room was getting up there & not just from the lights.
Best thing to do is just set it up & test the temp. We don't know what is the ambient room temp or any other details, so you can answer this question best yourself by plugging it in & checking with a reliable thermometer.
Anthony
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