As with most things, "allowed" and "preferred" can be presented interchangably by those that are in positions to standardize things and feel compelled to do so. To my knowledge (confirmed by two separate DIs) the lights may beturned off and on at THE appropriate times. If you are being graded and you miss the timing it will get you dinged. It is not something that is "not allowed"--it just must be done properly.
There are many variations to the strict versions presented at forums. Forums are a GREAT thing. So are the slight traditional enhancents and points-of-emphasis. To talk in absolutes about an oral tradition is fairly absurd when there are over 800 Lodges with histories going back over 150 as a sovereign jurisdiction. I understand what you are conveying, but Lodges that have the Chaplain pray at the furniture at opening and closing will not likely change their routine. To them that is an appropriate focus and not something that will likely be successfully challenged. That is something that has evolved over time and is a very appropriate innovation in my mind--if it is one--but it definately is a departation from the "instructed" ritual.
I guess my point of this rambling is to point out that not all "innovation" or differences from what you'll hear about in Forums are not "bad" and it is how our Ritual historically functions. We are clearly averse to change, but Freemasonry does evolve, and it is necessary. Standardizing ritual instruction definately helps keep things from moving quicker by promoting a "standard" and convincing us "Newer-Masons" from subscribing to radical innovations. Travel often and you will see differences that have evolved under the purview of their Masters for decades, and that is the way it has always been...and will be.
Be wary of innovation, but not obstinate. Weigh it and determine its appropriateness in Masonry and your heart. Freemasonry is dynamic and will always be. It is in our nature as Freemasons. There is always bad in good, and good in bad (checkered pavement). So search into "innovations" (at least to Texas Ritual) like the CoR and find what is appropriate to be applied. Clearly anteroom is a place for introspection, maybe that is something that could be encouraged. Making that time a place of solemnity and focus will clearly benefit the Candidate. Maybe black walls, skulls, and candles is a bit much for your Lodge; but clearly the intention of the room is in keeping with Masonic tradition. We need to analyze and synthesize in order to further Masonry for ourselves and especially the Candidate. Whether something is sanctioned or not I always try to look at what can I pull from all things and apply to improve myself, which is why you'll see me ask stupid questions and throwing out whacky ideas, but what I walk away with is an improved prospective.