Development and Performance Evaluation of Light Shelves Using Width-Adjustable Reflectors

Table 6

Performance evaluation results for light shelves with reflector widths of 0.3 m and 0.6 m.

Seasons	Light shelf		Illumination sensor (lx)		Uniformity ratio	Lighting dimming control: lighting number (dimming level)	Electricity consumption (kWh)
	Width (m)	Angle	Minimum	Average
Summer	0.3	−10°	71.7	222.3	0.322	1 (8)→3 (8)→2 (3)	0.124
		0°	76.1	236.5	0.322	1 (8)→3 (8)→2 (3)	0.124
		10°	79.1	243.8	0.324	1 (8)→3 (8)→2 (2)	0.120
		20°	86.3	246.2	0.350	1 (8)→3 (8)→2 (2)	0.120
		30°	88.4	250.8	0.352	1 (8)→3 (8)→2 (2)	0.120
	0.6	−10°	72.9	241.5	0.302	1 (8)→3 (8)→2 (2)	0.120
		0°	76.1	260.1	0.293	1 (8)→3 (8)→2 (2)	0.120
		10°	78.8	271.7	0.290	1 (8)→3 (8)→2 (2)	0.120
		20°	96.3	289.2	0.333	1 (8)→3 (8)→2 (1)	0.114
		30°	101.9	299.0	0.341	1 (8)→3 (8)→2 (1)	0.114
Middle season	0.3	−10°	81.9	286.1	0.286	1 (8)→3 (8)→2 (2)	0.120
		0°	86.6	295.6	0.293	1 (8)→3 (8)→2 (1)	0.114
		10°	91.0	299.0	0.304	1 (8)→3 (8)→2 (1)	0.114
		20°	99.3	308.6	0.322	1 (8)→3 (8)	0.102
		30°	107.4	310.3	0.346	1 (8)→3 (8)	0.102
	0.6	−10°	70.8	276.8	0.256	1 (8)→3 (8)→2 (2)	0.120
		0°	77.2	295.7	0.261	1 (8)→3 (8)→2 (1)	0.114
		10°	85.9	307.3	0.280	1 (8)→3 (8)→2 (1)	0.114
		20°	92.3	315.2	0.293	1 (8)→3 (8)→2 (1)	0.114
		30°	94.4	310.5	0.304	1 (8)→3 (8)→2 (1)	0.114
Winter	0.3	−10°	157.3	558.9	0.281	1 (8)→3 (1)	0.063
		0°	160.7	581.8	0.276	1 (8)→3 (1)	0.063
		10°	164.1	595.4	0.276	1 (8)→3 (1)	0.063
		20°	166.2	601.7	0.276	1 (8)→3 (1)	0.063
		30°	180.1	593.6	0.303	1 (8)→3 (1)	0.063
	0.6	−10°	139.8	532.4	0.263	1 (8)→3 (1)	0.063
		0°	145.1	556.3	0.261	1 (8)→3 (1)	0.063
		10°	150.5	582.6	0.258	1 (8)→3 (1)	0.063
		20°	156.7	607.5	0.258	1 (8)→3 (1)	0.063
		30°	164.4	616.7	0.267	1 (8)→3 (1)	0.063