I have a loop in ceiling rose lighting system. For the upstairs lights , I have a cable coming up from the fuse box which goes into a junction box where the cable is divided into two separate runs, one of which takes power to two lights the other takes power to four lights. My question is, is this OK or should i rewire the lights so the power is taken from rose to rose throughout. Some of the lights seem a bit dim, i didn't know whether this is as a result of the way they are wired. Thanks