New to arduino

Hi all, i have recently purchased a mega2560 and touchscreen along with screwshield and rtc. Now my idea is to run a diy led reef setup with this. The items have not srrived yet but should be sometime next week.
I plan to run a series of meanwell ldd hw drivers in this. Can anyone help me out regarding this please ?

I am totally new to this so all help and input is appreciated. When the items arrive i shall post pics of my project so you get a better idea of what im trying to achieve lol.

One question i will ask now though is, with these drivers being wired, do you simply connect to the arduino for the power. I plan on something like a 350w or 450w psu to run it all or is this too much.

Many thanks

edit this will be dimmable of course to create sunrise/sunset

I think you are going to need an external power supply because I have noticed lots of users saying that the 5v output of the arduino is only suited for small electrical components. By the way, when you say Reef setup you mean a fishtank right? A friend of mine asked me about the possibilities of this .. don't you need special types of lamps for this instead of regular LEDs?

Thanks for your reply, yes its for a fishy tank lol. Will be using mainly cree xte led's so that will suffice. Yes there will also have to be an external power supply for this i believe, i am looking into this. Also want to put temp probe and ph probe onto arduino to run with it.