You really want to get below 87f. That’s the highest you want to see before there is real stress involved. I’m guessing you are running hps or cmh since you said bulb. Best you can do in that aspect is get an led. Aside from that, you can remove the driver/balast from the tent and put it on the outside. They also sell venting hoods for hps that help remove excess heat. Personally I wouldn’t invest in one unless you have no other option. Lastly, try opening up the ventilation socks on your tent if you’re in veg. You can move the tent closer to the split unit. Another important factor is humidity. If your humidity in the tent is too low then the air can’t “grab” the heat to remove it. Water vapor absorbs heat. Getting the humidity to proper levels for your stage of growth can lower temperature significantly. If you are in flower then you can add a 4inch flex duct to one of the holes and cover the end with a cloth to block light.
For clones, you can feed them every watering with synthetics (I assume that’s what you have). Make sure you aren’t mixing the ppms to strong though. If you see signs of toxcicity then give them plain water next time and then resume feeding at a lower ppm/ec.
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