Therefore, it should be possible to use 10 luminaires. (b) Proposed layout A 5 x 2 array is proposed fro the lighting installation. (A 10 x 1 array is an alternative.) (c) Checking the proposed layout Since 2 x 1.8 m = 3.6 m < 8 m (width of room), the proposed layout will fit. (Usually checking only the linear dimension of the fitting for space is enough as the other dimension (i.e. 200 mm in this