I have recently installed a futronix p400 4 zone dimming unit. The specs say it is capable of dimming 4 x 300w of lighting. one of my zones has 4 x 50w mains(230v) halogen dichroics. When one of these lamps blew recently it took out the whole zone on the dimmer which then had to be sent back for repair.This has now happened a second time, can anything be fitted that will 'self sacrifice' before the futronix?