I would like to change the bulbs for an recessed 4 x 18w modular fittings 600MM x 600MM TO 36W FITTINGS. THERES 12 modular fittings IN A BARBA SHOP. THEY WOULD LIKE IT MORE BRIGHT IN THERE. THE MCB IS 16AMP WIRED IN 1.5MM T&E. would this be ok to do? i worked out the ib would be 13.51amps does this mean i have 2 also change the switch as well? any advice would be much apprecated thank you.