Fixed Low Profile IP65 Advanced LED Fire Rated Downlight

Do you need a driver per light fitting or can you loop fittings. How many fittings can be connected to one driver?
It is one driver per fitting - which is included. There is loop-in and loop-out.

Can you tell me whether the lamps are replaceable please?
The LED's are integral to the fitting and cannot be replaced.

Could you tell me if the driver fits through the 63mm hole?
The length of the driver is 125mm, a width of 40mm, and a height of 25mm. So it should fit just fine!

Are these lights compatible with smart bulbs?
These downlight have an integrated LED chip. If you want to use a smart LED bulb you might want to consider a fixture that uses GU10 bulbs.

What's the actual type of the lamp - is it a constant voltage drive or a constant current?
This is a COB LED lamp. The driver supplied is a constant current.

Are these lamps rats to be covered by insulation etc or is a lamp hood required? Installing these lamps directly above a shower cubicle - must I use low voltage lamps in that situation?
This fitting is a fixed mains COB LED, low voltage lamps are not needed. This is IP65 so fine to be used in a shower cubicle. The fitting itself is fire rated, and therefore no hood is needed.

What is the beam angle? And the number of lumens?
Warm white 2700°k, 460 lumens, 38° beam angle Neutral white 4000°K, 530 lumens, 38° beam angle

Will this fit a 73mm cut out?
This fitting has a 63mm cut out and rim of 76mm it’s only going to work in you larger hole if you use some builders adhesive to ensure it stays in place.

What clearance is required above and around this light for ventilation or fire protection?
No clearance is required above or around the light. The fitting itself is fire rated. It just needs a void depth of 91mm.

What voltage is on this product am I required to have a 240-12v power supply per lamp
These are a mains fitting (240) that come supplied with a LED driver.