With the temps you got and the size of the babys i wouldn`t worry obout tryin to get the light as close as pos your babys will be fine right now with the light about 18 inches away you don`t want to dry them out witch brings me to your next problem seedlings like it quite humid so you can give them a light misting(just a spray or so) every couple of hours or so and that will also keep your soil were it should be.
Your right to keep your fans goin i use a 400 and have the same problems just keep it on the lowest setting it won`t stunt em only make them grow stonger.
I would gently try and bring your light down but give them time take temp readings from top of the plants if its past 30c i wouldn`t take it down any further.
hope some of that helps mate keep us posted