Ensuite's a wet room, or with shower? If so, and for that size of space, it'd be classed as a zone 0 special location and the fittings will have to be IP65.
Find out the coefficient of heat transmission constant for the surrounding surfaces and use the most onerous one. Find out the max operating temperature of the light fttings. A quick calc on volume and heat absorption will show if the space is adequate for the heat output generated by the lights.
Dimmers in bathrooms, hmm, local building control might get sniffy.
And one question: who's certifying the electrical installation?
Ensuite's a wet room, or with shower? If so, and for that size of space, it'd be classed as a zone 0 special location and the fittings will have to be IP65.
Find out the coefficient of heat transmission constant for the surrounding surfaces and use the most onerous one. Find out the max operating temperature of the light fttings. A quick calc on volume and heat absorption will show if the space is adequate for the heat output generated by the lights.
Dimmers in bathrooms, hmm, local building control might get sniffy.
And one question: who's certifying the electrical installation?