ok - so I got 5 additional RFAs in a black Friday sale. They were big and expanded in the bag and attached right to the pvc end caps! Look great in the morning before lights come on, but retract down into the sand during the day. (Been in the tank for two days now). The RFAs that were there previously are open and look great. Lights are about 100 par at maximum and I have them turned down to about 60% right now. Is this typical of an “adjustment” period?