mirror do not omit mirror must have led lighting mirror must be surrounded on all four sides by a continuous warm white led strip mirror led strip must be recessed in an aluminium channel mirror led lighting is a required element and must be clearly visible walls ceiling ral 6009 fir green smooth ceiling higher at front sloping down to back no ceiling slats slatted feature wall only slatted element vertical timber slats only thin narrow slats geometry do not remove upper gap above slatted wall must exist and must be visible upper gap finish painted ral 6009 not timber upper gap size 30 mm at rear increasing to max 100 mm at front lower gap 100 mm above floor painted ral 6009 feature wall led lighting warm white led in recessed aluminium channel directly above slatted wall warm white led in recessed aluminium channel directly below slatted wall underside of slats not floor negative strict no slatted timber ceiling no timber in gaps no wide slats no led on floor do not remove mirror led lighting