Having a bit of a nightmare ,loads of led light fittings to be connected,on 1st fix used 1.5mm as spec,problem being is how to join this to the fittings,it's ok where a void is present,but with 2 x 1.5mm at fitting major problems,the designer put the problem back to us,he now suggested it would of been better to cable in 2 core flex,the drivers are remote & personally I don't think that would of been correct.In the cellar we can get back to a trunking with the joints,ok to crimp & heat shrink,or use wagos ,interested on your thoughts cheers