Skylighting Room
105.1_Hongkong: Direct Sun Blocking Ratio and Illuminance Deviation
Comparison under Clear Sky Condition |
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other windows |
No Covering |
N/S Blind/Louver |
W/E Blind/Louver |
Lighttex45 |
Illuminance Deviation |
Sun Blocked (%) |
Illuminance Deviation |
Deviation +/-% /NC |
Sun Blocked (%) |
Illuminance Deviation |
Deviation +/-% /NC |
Sun Blocked (%) |
Illuminance Deviation |
Deviation +/-% /NC |
Deviation +/-% /NS |
Deviation +/-% /WE |
Blocking +/-%/NS |
Blocking +/-%/WE |
March 21st |
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07:00am |
11 |
100 |
8 |
-27% |
49 |
9 |
-18% |
100 |
7 |
-36% |
-13% |
-22% |
0% |
104% |
08:00am |
56 |
100 |
15 |
-73% |
43 |
41 |
-27% |
100 |
13 |
-77% |
-13% |
-68% |
0% |
131% |
09:00am |
654 |
100 |
80 |
-88% |
41 |
153 |
-77% |
100 |
22 |
-97% |
-73% |
-86% |
0% |
142% |
10:00am |
1626 |
83 |
1577 |
-3% |
41 |
1601 |
-2% |
90 |
1565 |
-4% |
-1% |
-2% |
8% |
120% |
11:00am |
1976 |
45 |
1949 |
-1% |
41 |
1950 |
-1% |
67 |
1931 |
-2% |
-1% |
-1% |
47% |
64% |
12:00pm |
2161 |
15 |
2151 |
0% |
40 |
2137 |
-1% |
49 |
2130 |
-1% |
-1% |
0% |
219% |
21% |
01:00pm |
2163 |
15 |
2153 |
0% |
40 |
2139 |
-1% |
49 |
2133 |
-1% |
-1% |
0% |
227% |
20% |
02:00pm |
1982 |
45 |
61 |
-97% |
41 |
1957 |
-1% |
67 |
41 |
-98% |
-33% |
-98% |
48% |
64% |
03:00pm |
1636 |
82 |
71 |
-96% |
41 |
1609 |
-2% |
89 |
34 |
-98% |
-52% |
-98% |
8% |
117% |
04:00pm |
656 |
100 |
80 |
-88% |
42 |
153 |
-77% |
100 |
23 |
-96% |
-71% |
-85% |
0% |
140% |
05:00pm |
56 |
100 |
15 |
-73% |
43 |
42 |
-25% |
100 |
12 |
-79% |
-20% |
-71% |
0% |
135% |
06:00pm |
12 |
100 |
8 |
-33% |
47 |
10 |
-17% |
100 |
8 |
-33% |
0% |
-20% |
0% |
115% |
07:00pm |
No Direct Sun |
No Direct Sun |
No Direct Sun |
No Direct Sun |
No Direct Sun |
No Direct Sun |
No Direct Sun |
No Direct Sun |
No Direct Sun |
No Direct Sun |
No Direct Sun |
No Direct Sun |
No Direct Sun |
No Direct Sun |
June 21st |
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07:00am |
42 |
100 |
13 |
-69% |
100 |
22 |
-48% |
100 |
13 |
-69% |
0% |
-41% |
0% |
0% |
08:00am |
171 |
100 |
76 |
-56% |
49 |
105 |
-39% |
100 |
26 |
-85% |
-66% |
-75% |
0% |
106% |
09:00am |
1227 |
100 |
76 |
-94% |
24 |
749 |
-39% |
100 |
26 |
-98% |
-66% |
-97% |
0% |
314% |
10:00am |
1856 |
65 |
68 |
-96% |
12 |
1847 |
0% |
69 |
44 |
-98% |
-35% |
-98% |
6% |
473% |
11:00am |
2155 |
35 |
2137 |
-1% |
6 |
2150 |
0% |
38 |
2136 |
-1% |
0% |
-1% |
8% |
590% |
12:00pm |
2301 |
10 |
2293 |
0% |
3 |
2296 |
0% |
12 |
2289 |
-1% |
0% |
0% |
20% |
379% |
01:00pm |
2288 |
14 |
70 |
-97% |
3 |
2282 |
0% |
16 |
59 |
-97% |
-16% |
-97% |
15% |
471% |
02:00pm |
2114 |
40 |
2095 |
-1% |
6 |
2108 |
0% |
43 |
2094 |
-1% |
0% |
-1% |
8% |
580% |
03:00pm |
1791 |
71 |
70 |
-96% |
13 |
835 |
-53% |
74 |
45 |
-97% |
-36% |
-95% |
5% |
449% |
04:00pm |
1164 |
100 |
77 |
-93% |
27 |
1138 |
-2% |
100 |
25 |
-98% |
-68% |
-98% |
0% |
271% |
05:00pm |
100 |
100 |
73 |
-27% |
55 |
29 |
-71% |
100 |
19 |
-81% |
-74% |
-34% |
0% |
82% |
06:00pm |
31 |
100 |
12 |
-61% |
100 |
19 |
-39% |
100 |
12 |
-61% |
0% |
-37% |
0% |
0% |
07:00pm |
4 |
100 |
4 |
0% |
100 |
4 |
0% |
100 |
4 |
0% |
0% |
0% |
0% |
0% |
September
21st |
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07:00am |
18 |
100 |
10 |
-44% |
43 |
16 |
-11% |
100 |
8 |
-56% |
-20% |
-50% |
0% |
135% |
08:00am |
82 |
100 |
17 |
-79% |
41 |
59 |
-28% |
100 |
16 |
-80% |
-6% |
-73% |
0% |
143% |
09:00am |
936 |
100 |
78 |
-92% |
41 |
925 |
-1% |
100 |
24 |
-97% |
-69% |
-97% |
0% |
145% |
10:00am |
1711 |
73 |
67 |
-96% |
40 |
1531 |
-11% |
83 |
36 |
-98% |
-46% |
-98% |
14% |
106% |
11:00am |
2021 |
38 |
1816 |
-10% |
40 |
62 |
-97% |
62 |
42 |
-98% |
-98% |
-32% |
64% |
55% |
12:00pm |
2161 |
9 |
1955 |
-10% |
40 |
66 |
-97% |
44 |
51 |
-98% |
-97% |
-23% |
414% |
11% |
01:00pm |
2122 |
21 |
1914 |
-10% |
40 |
65 |
-97% |
52 |
45 |
-98% |
-98% |
-31% |
143% |
30% |
02:00pm |
1903 |
53 |
61 |
-97% |
40 |
59 |
-97% |
71 |
39 |
-98% |
-36% |
-34% |
35% |
76% |
03:00pm |
1438 |
93 |
73 |
-95% |
44 |
1392 |
-3% |
96 |
32 |
-98% |
-56% |
-98% |
3% |
117% |
04:00pm |
173 |
100 |
79 |
-54% |
41 |
156 |
-10% |
100 |
20 |
-88% |
-75% |
-87% |
0% |
142% |
05:00pm |
45 |
100 |
13 |
-71% |
43 |
35 |
-22% |
100 |
13 |
-71% |
0% |
-63% |
0% |
135% |
06:00pm |
7 |
100 |
7 |
0% |
52 |
7 |
0% |
100 |
6 |
-14% |
-14% |
-14% |
0% |
94% |
07:00pm |
No Direct Sun |
No Direct Sun |
No Direct Sun |
No Direct Sun |
No Direct Sun |
No Direct Sun |
No Direct Sun |
No Direct Sun |
No Direct Sun |
No Direct Sun |
No Direct Sun |
No Direct Sun |
No Direct Sun |
No Direct Sun |
December 21st |
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07:00am |
Solar elevation is less than 1 degree, ignored. |
08:00am |
24 |
100 |
11 |
-54% |
100 |
12 |
-50% |
100 |
11 |
-54% |
0% |
-8% |
0% |
0% |
09:00am |
109 |
100 |
58 |
-47% |
100 |
49 |
-55% |
100 |
18 |
-83% |
-69% |
-63% |
0% |
0% |
10:00am |
923 |
98 |
54 |
-94% |
100 |
66 |
-93% |
100 |
26 |
-97% |
-52% |
-61% |
2% |
0% |
11:00am |
1214 |
51 |
673 |
-45% |
100 |
77 |
-94% |
100 |
25 |
-98% |
-96% |
-68% |
97% |
0% |
12:00pm |
1502 |
15 |
1473 |
-2% |
100 |
81 |
-95% |
100 |
25 |
-98% |
-98% |
-69% |
584% |
0% |
01:00pm |
1476 |
24 |
1443 |
-2% |
100 |
80 |
-95% |
100 |
35 |
-98% |
-98% |
-56% |
311% |
0% |
02:00pm |
1147 |
63 |
47 |
-96% |
100 |
74 |
-94% |
100 |
74 |
-94% |
57% |
0% |
60% |
0% |
03:00pm |
652 |
100 |
58 |
-91% |
100 |
62 |
-90% |
100 |
23 |
-96% |
-60% |
-63% |
0% |
0% |
04:00pm |
67 |
100 |
17 |
-75% |
100 |
42 |
-37% |
100 |
16 |
-76% |
-6% |
-62% |
0% |
0% |
05:00pm |
15 |
100 |
9 |
-40% |
100 |
10 |
-33% |
100 |
9 |
-40% |
0% |
-10% |
0% |
0% |
06:00pm |
No Direct Sun |
No Direct Sun |
No Direct Sun |
No Direct Sun |
No Direct Sun |
No Direct Sun |
No Direct Sun |
No Direct Sun |
No Direct Sun |
No Direct Sun |
No Direct Sun |
No Direct Sun |
No Direct Sun |
No Direct Sun |
07:00pm |
No Direct Sun |
No Direct Sun |
No Direct Sun |
No Direct Sun |
No Direct Sun |
No Direct Sun |
No Direct Sun |
No Direct Sun |
No Direct Sun |
No Direct Sun |
No Direct Sun |
No Direct Sun |
No Direct Sun |
No Direct Sun |
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