If it were actually a temporary light fixture it would have looked something like this:
which it appears it is meant to look like, but there was no base or generator as seen here. This seems to be a permanent fixture that was not inspected recently.
Not necessarily . . . temporary lights come in many different shapes and sizes, this looks like diesel powered work lights, older ones. The National Electric Code allows for certain temporary lighting which is plugged in to an outlet, but even then it really has to follow certain rules and I think can only be used for something 90 days for the purposes of construction and such. The gasoline powered lights, probably big halogens spots lights, are used on construction sites where you can plug something in, like on the freeway, usually not where you have an outlet.
But there really isn't a way to put in a "temporary lamp post" that is square with the National Electric Code as nobody knows how long temporary will turn out to be. Putting in a permanent lamp post is so cheap to do (I've done it several times), that there is no reason to put in something that can ripped up later as the cost difference is not that much.
I have gotten a close look at the "temporary" lighting structures around DLR security entrance and they are metal conduit coming off from a lamp post so that they can have lights and outlets on the "temporary" security tents, It's been this way since 9/11 I guess. It's not pretty looking, but electrically its OK, as buried conduit is much more safer and acceptable in traffic areas as bare metal conduit is a trip hazard, plus could be deformed by wind kocking over the security tent. Given how clueless some castmembers are, the metal conduit could be sheared, you could have a ground fault, or a dangerous situation if not properly grounded/GFCI. I can't believe they left it this way so long as it wreaks of the temporary power supplies setup by county fairs and such.
That being said, the electrical hook-ups for the security tent at DLR may be code compliant, but this was a stupid thing to do in terms of leaving it this way so long and having the highest level of safety for guests.
Looking at Expedition Everest, I am 90% sure that what they did was
NOT compliant with the National Electric Code, meaning that who installed this was perhaps breaking the law and putting guests in danger, probably because they didn't know what they were doing, which means Disney may have been hiring whoever could do it cheaply.