Well, adding an inline fan bringing air in, might help some, though I feel like PULLING air out, is more effective. Adding a fresh air fan, or a bigger exhaust fan, would both help. Also, where the exhaust and fresh air are being pulled from, can help. You want to basically be pulling the exhaust air across your bulbs on the way out, to help cool them, kind of like the hoods on Hps/ Mh lights.
If you can somehow bring in air from a place that is a little cooler, that can help to.
Definitely not saying you have to run out and spend a bunch of money on keeping your tent cooler right away, but it will certainly help in the future. The more you can keep your plants in homeostasis, the better everything will go. If the plants aren't to hot, then the better they resist pests, or under watering. If they are not having to fight off pests and disease, the better they will be able to cope with the tent getting a little to hot, or the nutes getting a little off, Etc.
All things in balance, so no system gets overly stressed, and breaks, or fails.