adding live rock

[68shelby]

I have an existing 100G with a sump directly below in the stand. I am in the process of setting up a larger sump downstairs, that will include a refuguim, sand, and live rock (rubble). My question is do I need to cure the live rock rubble? it will probably be less than 5 lbs. Any suggestions? And what is the best type lighting for the refugium. It will be run opposite hrs.

Thanks