Should I leave my lights on while cycling my tank?

[mmync]

I am cycling my soon to be reef tank and just curious if I should leave the lights on while cycling. I have about 70 lbs of live rock and 40lbs of live sand. I am just temporarily using 2 plain 18" lights until i get my mh/vho lights. I know i probaly would be advised to leave the lights off, but being that there is some live rock and sand in there I thought maybe they should be on.

 

[ddt]

I would leave the lights on minimally or not at all during the cycling. I had mine set to normal 12 hr on 12 off while cycling. At the end of the cycle, I went to Disneyland for a week and when I returned I had a hair algea outbreak with growth of approx. 4".