I've never seen a discussion about heat given off by a given LED grow light vs another. Perhaps that's because, compared to gas discharge, LED's generate so little heat.
The driver for your light can be dismounted so that will help get that heat source out of the tent. If the wires on the light are not long enough, you could patch in your own extension cord. I've added 10' to the wire for my Mars SP 3000.
Re. temps - the Chandra paper "Photosynthetic response of Cannabis sativa L. to variations in photosynthetic photon flux densities, temperature and CO2 conditions" demonstrates how the rate of photosynthesis increases as ambient temp increases, up to 30°C. That's in a CO2-enhanced environment but the underlying processes are the same at 420 PPM.
Per the graphic below, net photosynthesis increases from 13±µmols/m2 to 18±µmols/m2 when the temperature goes from 77° to 86° which is pretty much the same bump as going from 500µmols of light to 1000µmols. You might find that 86° is too warm for your liking but, if you can keep control your RH, you should be able to get increased yield at the higher temps rather than at 73°.
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