Thats a truly toss up question to ask...
Fact of the matter is you look at it from a perspective. Not everyone has the computers to just run everything on high res and not lag...Then you have others who struggle to use what they have now...
Basically from a design aspect, you go forth...add what you add...Those who have the luxary, will be able to see what you have, all the benefits of the lighting, and everything else the server has to offer.
Those who can't apply the lighting effects, will see nothing special, but if you can captivate those who have the feature on, then you've done your job and all that you could ask of yourself and your server...
Just basically those who have the ability will enjoy, those who don't will simply just see it as "another server"...Sad but thats the way it works...Graal has some weird lag, it's just crazy to see such a small game have so much more lag than a graphical intensive game that when you run at 1600 x 1200 it doesn't lag, yet you play graal and it lags...Odd no?
Well thats my 2 cents...prolly means nothing but hey, I said it anyways