How do you know its not going to harm his monitor? Do you know the history? Do you know this keepers husbandry experience and abilities? Sir this is a very strong point for the internet. You know know anything about the situation. Or at least very little. Consider, he keeps asking basic questions, so you must consider him new.(not dumb or spoiled, just new)
Lets break it down. This keeper, recently acquired his ackie. He did a very good job of preparing to house his ackie(his first good decision) The made sure his cage was as close to good as possible before he allowed me to send the monitor.(his ackie is a recent hatchling, I have intimate knowledge of this)
The problem is, many keepers think once they set it up, its suppose to work properly. After all, he did what he was told. And keep in mind, he did a good job. The reality of keeping is, all cages require constant changes and modifications.
Next, he recieved the monitor. The monitor did not react in a way he thought it would. It was shy and would not feed in front of him. I do not know what he was thinking it would do, for that you would have to ask him. He asked for help on this forum. A few adjustments were made and the monitor started feeding better. The questions of how much better and to what degree are not known.
Within days of this improvement, he wants to change the conditions to something else. The truth is, its does not matter to what. Whenever a change is made, it does impact the monitor. The question is how much. Of course with larger monitors, the effect may not even be noticeable. With smaller monitors, the effects of change can be very noticeable.
If you go back, you would see, My recomendation would be to leave it alone and get some growth and weight on it first. Then I recomended some ways to solve the problem. Newbies are very impatient, which can be considered not smart, and spoiled. They want to be entertained right away. That can be considered spoiled. ITs spoiled by the availibility of instant entertainment. Animals simply cannot compete with MP3's or IPODS, or computers, and direct TV. It takes a bit longer then switching stations.
In my humble opinion, to change the conditions of an individual monitor that only recently when from questionable, to a positive behavior is not smart. To do this with a baby is even more on the not smart side of the ledger. To not wait a week or a few weeks or months(what ever it takes to put on some size) is again, not so smart. Again the subject is a very recent hatchling.
All of this is because the lites on at night. That this keeper refuses to allow the monitor to gain strenght or simply wants HIS way, is in my humble opinion a little spoiled. Then considering there are a thousand ways to solve the problem without having to change the recent successful direction in cage conditions, is again, not so smart and a little spoiled.
In my humble opinion, I would think anyone with a brain would want a recent hatchling that only barely started to progress in their care, to gain strenght and size before making changes. Consider changes are a gamble, the successful exsisting conditions are not.
This brings to mind a quote from a Western, "are you feeling lucky mister" The big difference is, the gunfighter that said that, was talking about the other gunfighter. Is that gunfighter feeling lucky with his own life. In our case, our gunfighter is gambling with the monitors life, not his own.
With a hatchling, a smart person would not gamble on such a minor easily fixed situation.
The sad part is, this persons ego is over riding his intelligence. Which is so very common here.
So yes, it "may" not be a problem, but there is no real reason to find out, why not let the monitor get stronger? See how simple that is. Cheers