positive walls ceiling ral 6009 fir green smooth ceiling higher at front sloping down to back mirror warm white led strip in recessed aluminium channel around full perimeter mandatory feature wall only slatted element vertical timber slats thin narrow geometry slatted wall top level upper painted gap ral 6009 30 mm at rear max 100 mm at front lower painted gap 100 mm above floor lighting warm white led in recessed aluminium channel directly above slatted wall warm white led in recessed aluminium channel directly below slatted wall fixed to underside of slats not floor negative no slatted or timber ceiling no timber in upper or lower gaps no wide slats no led on floor do not omit mirror led do not exceed stated gap dimensions
