I haven't been to one with a light yet, but I figure I'd take something like the Fenix PD32UE. That way it's pretty floody, easy to carry, and can be set to decently low levels of output or even up to a sustained 400 lumens if the place isn't too crowded.
At first I was pretty excited to consider going to one of these, but then I figured that it might not be very enjoyable to be blinded by other people the whole time. I'm still on the fence. Maybe I'll wait until next year and go in late September when less people are thinking about doing it.
The Event i attended was intended to be a flashlight maze, admittance after dark from 1900h to 2030h ET. I'd suggest bringing a couple different lights like I did, preferably with neutral or warmer tints. There were so many relatively dim cool blue lights bobbing around that it got kind of creepy, especially when the herd dispersed. The stalks were about 10 feet tall, and the field had no observation towers. During the last quiet leg of the maze, The neutral tint of the ea4 was rather comforting, and allowed for a more relaxing stroll in an otherwise eerily quiet environment. Went in at 1955h came out at 2045h, so we did pretty good for a 1 to 2 hour maze.
Quick impressions on the lights deployed:
nitecore ea4 NW: Great tint, extra runtime on 300 lumens, very good for long corridors. Very manageable size, and the battery indicator would've been very useful had we been in the maze for longer than expected.
nitecore tm11: decent tint on lower modes, AWESOME runtime, decent for long corridors. Found it slightly impractical as the lowest mode could be considered a high mode on smaller lights, produced lots of glare from foliage. Also kind of an inconsiderate light to employ around others in close proximity. However, great for impressing little kids.
Jetbeam rrt0 XML 16340: decent tint when paired with water bottle cap as diffuser, great flood light. Easy access to lower modes when approaching other people, rendered foliage quite nicely. Relatively soft light when diffused, even at 500 lumens. Possibly the most practical light in my arsenal that evening.
klarus st20: this is my edc task light, I feel naked without it. In the corn maze, it saw 3 seconds of use, then promptly went back into my pocket. Tint is the typical xpg cool white, more like an icy blue. While the brightness COULD have made this a useful light in this situation, the tint caused the foliage colors to POP out, making greens greener, while dulling reds and browns. It is more suited to urban environments. Utterly useless when looking for dirt patterns I left to misguide other adventurers. Intensity was too high for close up use, but an underhand carry would allow for easy mode switching. So glad the maze was a relatively tame environment.
btw, the general strategy of a maze IMO seems to be cut in as deep as you can go until you start hitting circles. The you know you're at the halfway ish point. Depending where the exit is, you then want to make your way to the back outside perimeter of the maze, and circle back around. Should've stopped to look at the map to begin with lol. The path commonly feels like omega symbols or question marks, forcing you to enjoy the entirety of the maze