I have a Saxby 73788 bathroom downlight that's been acting up. Often, it had a delay before coming on. Today, it's flashing. It flashes 3 times rapidly then goes off for a short while. This then repeats. Anyone knows what this means? How do I work out if the problem is to do with the light, the wiring, or the "driver". I know nothing about the driver and how it affect things.