There starting to dig my pool tomorrow. I requested all 2" sch 40 pipping on all my suction and return lines. But I didn't think to request hard pipping for my Led lights. I was not home when he dropped off all his supplies. Along with the 2" hard pipe was 2 rolls of 1 1/2" flex. My guess is that's for the lights. If it is should I request hard pipe or would flex be ok?