When dealing with ceiling heights above 32 course or 2.7meters, domestic downlights are generally not going to be as effective at illumination at floor level, and where commercial buildings, this may be critical to satisfy BCA rules.

Cutouts generally larger than 100mmØ + are non standard and found in more commercial applications or homes that have high ceilings. These larger style cutout downlights usually provide more light and optic options than your standard domestic downlights, due to larger optic control and room for more powerful light drivers.

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