Expert Spotlight: SOX Lamps: Lighting-up
Lumioo Studio SOX Club Expert Series
Episode 5: SOX Lamps: Lighting-up
Author: Matthew Eagles
Early morning, October 2002, in Gresford, Wrexham, U.K.
Please note: the content of the Colour, Data and Lighting-Up pages have been re-arranged from previous versions.
Lighting-up data
Below are tables of data that show most of the sensitivity values recorded from 1987 to 2011. Part of this data was used to make the graphs/charts on the "Lighting-Up" page. For example, from table (a), streetlight "D" switched on around 11 minutes after sunset (on average) on each day in 1988. From the tables you can see that some streetlights do not change over time whereas some do. A value of "P" means the streetlight was permanently switched on (dayburning), whereas "X" means that the streetlight was not working (i.e. it never switched on).
Data are also shown amongst the tables below of how soon streetlights switch off in the morning, using a sample of data obtained from Gresford and Minera, (both in Wrexham), U.K. in the period 2002 - 2011. A positive number indicates how many minutes BEFORE sunrise a streetlight switched off, whereas a negative number indicates numbers of minutes AFTER sunrise. So, in 2005 for example, M8 would be the first light to switch off (NB: the value of 4 for 2002/3 is not a typo), and M2 the last light to switch off.
The units of measure in the tables below are minutes after sunset (p.m.) or minutes before sunrise (a.m.). Only days of fine weather have been included - days of full cloud cover, rain etc. have been excluded.
(a) Streetlamps observed from 1987 in Clitheroe, Lancashire, U.K. (p.m.)
Average number of minutes after sunset when the lamps listed would switch on, in fine weather
|
Lamp
|
 Description
|
1987 | 1988 | 1989 | 1990 | 1994 | 1995 | 1996 | 1997 |
|
D
|
 Thorn Beta 5 (1970s/80s) 35W
|
17 | 11 | 10 | Â | Â | Â | Â | Â |
| Â E |
 Thorn Beta 5 (1970s/80s) 35W
|
9 | 8 | 8 | Â | Â | Â | Â | Â |
|
F
|
 Thorn Beta 5 (1970s/80s) 35W
|
29 | 31 | 36 | Â | Â | Â | Â | Â |
|
G
|
 Thorn Beta 5 (1970s/80s) 35W
|
16 | 14 | 18 | 22 | Â | Â | Â | Â |
|
H
|
 Thorn Beta 5 (1970s/80s) 35W
|
10 | 10 | 13 | Â | Â | Â | Â | Â |
|
I
|
 Thorn Beta 5 (1970s/80s) 35W
|
21 | 19 | 22 | Â | Â | Â | Â | Â |
|
J
|
 Thorn Beta 5 (1970s/80s) 35W
|
2 | 2 | 5 | Â | Â | Â | Â | Â |
|
K
|
 1960s/70s 35W SOX
|
15 | 14 | 18 | Â | Â | Â | Â | Â |
|
L
|
 Thorn Beta 5 (1970s/80s) 35W
|
9 | 8 | 12 | Â | Â | Â | Â | Â |
|
M
|
 Thorn Beta 5 (1970s/80s) 35W
|
12 | 11 | 16 | Â | Â | Â | Â | Â |
|
N
|
 Thorn Beta 5 (1970s/80s) 35W
|
-5 | -7 | -4 | Â | Â | Â | Â | Â |
| Â O |
 Revo 'Dalek' 35W
|
17 | 17 | 19 | Â | Â | Â | Â | Â |
|
R
|
 Thorn Beta 5 (1970s/80s) 35W
|
-2 | -2 | Â | Â | Â | Â | Â | Â |
|
S
|
 Thorn Beta 5 (1970s/80s) 35W
|
4 | 5 | Â | Â | Â | Â | Â | Â |
|
T
|
 Thorn Beta 5 (1970s/80s) 35W
|
7 | 8 | 12 | Â | Â | Â | Â | Â |
|
U
|
 Revo 'Dalek' 35W
|
20 | 21 | 12 | 9 | Â | Â | Â | Â |
|
V
|
 Thorn Beta 5 (1970s/80s) 35W
|
16 | 14 | Â | Â | Â | Â | Â | Â |
|
W
|
 Thorn Beta 5 (1970s/80s) 35W
|
 | 25 | 32 |  |  |  |  |  |
|
a
|
 Thorn Beta 5 (1970s/80s) 35W
|
 | 19 | 22 | 21 |  |  |  |  |
|
h
|
 1970s/80s 90W SOX
|
 | 33 | 39 | 40 |  |  |  |  |
|
i
|
 1970s/80s 90W SOX
|
 | 12 | 18 | 18 |  |  |  |  |
|
j
|
 1970s/80s 90W SOX
|
 | 34 | 37 | 35 |  |  |  |  |
|
k
|
 1970s/80s 90W SOX
|
 | 11 | 15 | 13 |  |  |  |  |
|
l
|
 1970s/80s 90W SOX
|
 | 13 | 22 | 23 | 10 | 8 | 7 |  |
|
m
|
 1970s/80s 90W SOX
|
 | 13 | 22 | 24 | 15 | 9 | 8 | 8 |
|
n
|
 1970s/80s 90W SOX
|
 | 11 | 13 | 10 | -2 | 4 | 10 | 9 |
(b) Streetlamps observed 1989-2005 in Clitheroe, Lancashire, U.K. (p.m.)
Average number of minutes after sunset when the lamps listed would switch on, in fine weather
|
Lamp
|
 Description
|
1989 | 1990 | 1993 | 1994 | 1995 | 1996 | 1997 | 1999 | 2001 | 2002 | 2005 |
|
B2
|
 Philips MA90 90W *
|
28 | 29 | 18 | 18 | 19 | 19 | 19 | 19 | 20 | 19 | 12 |
|
B3
|
 Philips MA50 135WÂ
|
29 | 31 | 13 | 17 | 23 | 26 | 26 | 27 | 29 | 30 | 15 |
|
B4
|
 Philips MA90 90W
|
25 | 27 | 16 | 17 | 16 | 18 | 15 | 5 | Â | Â | Â |
|
B5
|
 Philips MA90 90W
|
27 | 28 | 17 | 17 | 19 | 21 | 20 | 22 | 22 | 15 | 14 |
|
B6
|
 Philips MA90 90W
|
23 | 21 | 9 | 7 | 8 | 7 | 5 | 3 | 2 | -3 | 12 |
|
B7
|
 Philips MA90 90W
|
28 | 30 | 11 | 10 | 8 | 2 | -1 | -1 | -5 | -13 | 12 |
|
B8
|
 Philips MA90 90W
|
28 | 29 | 8 | 7 | 7 | 7 | 7 | 8 | 6 | 2 | 17 |
|
B9
|
 Philips MA90 90W
|
24 | X | 11 | 10 | 13 | 15 | 14 | 17 | Â | Â | Â |
|
C2
|
 Beta 5 (1989 model)
|
26 | 29 | 20 | 20 | 21 | 21 | 21 | Â | Â | Â | Â |
|
C3
|
 Beta 5 (1989 model)
|
20 | 20 | 10 | 10 | 9 | 9 | 9 | 11 | Â | Â | Â |
|
C4
|
 Beta 5 (1989 model)
|
26 | 28 | 10 | 14 | 16 | 19 | 19 | 23 | Â | Â | Â |
|
C5
|
 Beta 5 (1989 model)
|
22 | 23 | 9 | 8 | 7 | 8 | 8 | 9 | Â | Â | Â |
|
C6
|
 Beta 5 (1989 model)
|
17 | 15 | 3 | 3 | 4 | 5 | 9 | 17 | Â | Â | Â |
|
C7
|
 Beta 5 (1989 model)
|
22 | 21 | 14 | 12 | 13 | 14 | 14 | 14 | Â | Â | Â |
|
C8
|
 Beta 5 (1989 model)
|
23 | 21 | 9 | 7 | 7 | 9 | 8 | 6 | Â | Â | Â |
|
C9
|
 Beta 5 (1989 model)
|
23 | 22 | 9 | 7 | 6 | 9 | 7 | 6 | Â | Â | Â |
|
C10
|
 Beta 5 (1989 model)
|
24 | 23 | 9 | 7 | 5 | 6 | 6 | 9 | Â | Â | Â |
|
E2
|
 Beta 5 (1989 model)
|
 | 27 | 18 | 18 | 18 | 19 | 19 | P |  |  |  |
|
E5
|
 Beta 5 (early 1990s)
|
 |  | 11 | 12 | 10 | 12 | 12 | 13 |  |  |  |
|
E7
|
 Beta 5 (1970s/80s)
|
 |  |  | -5 | -8 | -7 | -6 | 23 | 32 | 35 |  |
|
E9
|
 Philips MA90 90W
|
 |  |  |  | 13 | 14 | 13 |  |  |  |  |
|
H2
|
 Beta 5 (1989 model)
|
  |  |  |  |  | 11 | 9 | P |  |  |  |
|
H5
|
 Philips MA90 90W
|
  |  |  |  |  | 1 | 1 | 3 | 10 | 7 |  |
* additional values for B2: 19 (1991), 15 (1992)
(c) Streetlamps observed in 2002-06 in Gresford, Wrexham, U.K. (a.m. & p.m.)
Average number of minutes before sunrise/after sunset when the lamps listed would switch on/off, in fine weather
|
|
|
p.m. | a.m. | |||||||
|
Lamp
|
 Description
|
2002 | 2003 | 2004 | 2005 | 2006 | 2002/03 | 2003/04 | 2004/05 | 2005/06 |
|
L7
|
 Beta 5 (1970s/80s) 35W
|
17 | 17 | 18 | 20 | Â 7 | 9 | 11 | 10 | 15 |
|
L8
|
 Philips MI-26 (1990s) 35W
|
12 | 12 | 12 | 12 | 10 | 8 | 9 | 8 | 8 |
|
L9
|
 Beta 5 (1970s/80s) 35W
|
X | X | X | X | X | X | X | X | X |
|
L10
|
 Philips MI-26 (1990s) 35W
|
15 | 15 | 15 | 16 | 13 | 11 | 12 | 10 | 11 |
|
M1
|
 Philips MI-26 (1990s) 35W
|
13 | 13 | 13 | 14 | 11 | 7 | 8 | 7 | 8 |
|
M2
|
 Philips MI-26 (1990s) 35W
|
8 | 8 | 7 | 8 | 5 | -10 | -9 | -10 | -9 |
|
M3
|
 Philips MI-26 (1990s) 35W
|
15 | 16 | 15 | 15 | 13 | 0 | 1 | -1 | -2 |
|
M4
|
 Philips MI-26 (1990s) 35W
|
12 | 11 | 11 | 11 | 9 | 6 | 7 | 6 | 7 |
|
M5
|
 Beta 5 (1980s/90s) 35W
|
13 | 13 | 13 | 14 | 12 | Â | 18 | 17 | 18 |
|
M6
|
 Beta 5 35W
|
20 | 19 | 16 | 15 | 13 | 11 | 10 | 6 | 7 |
|
M7
|
 GEC Z9554 1970s 90W
|
17 | 18 | 20 | 19 | 17 | 13 | 14 | 14 | 15 |
|
M8
|
 Philips MA50 135W
|
23 | 22 | 19 | 18 | 17 | 4 | 23 | 21 | 24 |
|
M9
|
 Beta 5 (1970s/80s) 35W
|
8 | 12 | 13 | 15 | 13 | 5 | 9 | 10 | 11 |
|
N1
|
 Beta 5 (1970s/80s) 35W
|
20 | 20 | 17 | 17 | 13 | 11 | 10 | 8 | 7 |
|
N2
|
 Beta 5 35W
|
12 | 12 | 13 | 15 | 13 | 18 | 21 | 20 | 23 |
|
N4
|
 Beta 5 (1970s/80s) 35W
|
22 | 18 | 16 | 16 | 13 | 12 | 10 | 5 | 7 |
|
N6
|
 Beta 5 (1970s/80s) 35W
|
 | 15 | 15 | 15 |  |  | 9 | 10 |  |
(d) Streetlamps observed 2006-2011 in Minera, Wrexham, U.K. (a.m. & p.m.)
Average number of minutes before sunrise/after sunset when the lamps listed would switch on/off, in fine weather
|
|
|
p.m. | a.m. | |||||||||
|
Lamp
|
 Description
|
2006 | 2007 | 2008 | 2009 | 2010 | 2011 | 2006/07 | 2007/08 | 2008/09 | 2009/10 | 2010/11 |
|
Q1
|
 Philips MI-26 (1990s) 35W
|
 5 | -7 | -37 | -64 | -82 | -24 | 4 | -4 | -8 | -9 | -10 |
|
Q3
|
 Philips MI-26 (1990s) 35W
|
21 | 19 | 21 | 19 | 18 | 23 | 27 | 28 | 27 | 23 | 23 |
|
Q4
|
 Philips MI-26 (1990s) 35W
|
19 | 14 | 17 | 16 | 16 | 16 | 24 | 24 | 23 | 23 | 24 |
|
Q5
|
 Thorn Beta 5 (1980s/90s) - slim bowl
|
19 | 18 | 19 | 18 | 19 | 19 | 22 | 23 | 22 | 22 | 22 |
|
Q6
|
 Thorn Beta 5 (1980s/90s) - slim bowl
|
16 | 15 | 16 | 15 | 15 | 16 | 20 | 21 | 20 | 20 | 20 |
|
Q7
|
 Thorn Beta 5 (1980s/90s) - slim bowl
|
17 | 16 | 18 | 17 | 18 | 18 | 23 | 24 | 24 | 23 | 24 |
|
Q8
|
 Philips MA - probably 135W
|
9 | 8 | 9 | 8 | 7 | 7 | 6 | 4 | 1 | 1 | 2 |
|
Q9
|
 Philips MA - probably 135W
|
8 | 8 | 13 | 11 | 9 | 10 | 3 | 4 | 1 | 1 | -8 |
|
Q10
|
 Philips MA - probably 135W
|
9 | 7 | 8 | 7 | 7 | 8 | 3 | 3 | 1 | 1 | 2 |
|
Q11
|
 Thorn Beta 5 (1970s/80s) 35W
|
5 | 6 | 8 | 6 | 6 | 8 | 4 | 6 | 4 | 3 | 4 |
|
R1
|
 Thorn Beta 5 (1970s/80s) 35W
|
13 | 11 | 13 | 11 | 11 | 12 | 4 | 4 | 2 | 1 | 6 |
|
R2
|
 Philips MI-26 (1990s) 35W
|
34 | 30 | 29 | 26 | 26 | 24 | 22 | 20 | 19 | 17 | 19 |
|
R3
|
 Philips MI-26 (1990s) 35W
|
26 | 25 | 26 | 24 | 24 | X | 22 | 23 | 22 | 22 | X |
|
R4
|
 Philips MI-26 (1990s) 35W
|
27 | 25 | 25 | 24 | 23 | 23 | 17 | 18 | 16 | 16 | 16 |
|
R5
|
 Philips MI-26 (1990s) 35W
|
33 | 31 | 32 | 31 | 30 | 30 | 18 | 19 | 18 | 17 | 19 |
|
R6
|
 Philips MI-26 (1990s) 35W
|
25 | 23 | 24 | 22 | 21 | 22 | 18 | 19 | 15 | 16 | 16 |
|
R7
|
 Thorn Beta 5 (1970s/80s) 35W
|
22 | 18 | 20 | 17 | 17 | 18 | 15 | 17 | 16 | 14 | 15 |
|
R8
|
 Philips MI-26 (1990s) 35W
|
X | X | X | X | X | X | X | X | X | X | X |
|
R9
|
 Thorn Beta 5 (1970s/80s) 35W
|
22 | 20 | 21 | 18 | 18 | 17 | 15 | 17 | 14 | 13 | 13 |
|
S1
|
 Philips MI-26 (1990s) 35W
|
15 | 14 | 14 | 14 | 13 | 13 | 17 | 14 | 14 | 14 | 8 |
|
S2
|
 Thorn Beta 5 (1970s/80s) 35W
|
12 | 11 | 12 | 11 | 11 | 11 | 17 | 18 | 17 | 17 | 19 |
|
S3
|
 Thorn Beta 2 55W
|
12 | 12 | 12 | 11 | 11 | 11 | 16 | 17 | 16 | 16 | 17 |
|
S4
|
 Philips MI-26 (1990s) 35W
|
18 | 17 | 18 | 17 | 17 | 17 | 23 | 25 | 23 | 23 | 24 |
|
S5
|
 Philips MI-26 (1990s) 35W
|
22 | 18 | 22 | 20 | Â | Â | 17 | 21 | 16 | 10 | Â |
|
S6
|
 Philips MI-26 (1990s) 35W
|
21 | 17 | 19 | 14 | 0 | -3 | 16 | X | 16 | -2 | -4 |
|
S7
|
 Thorn Beta 5 (new)
|
14 | 13 | 13 | 13 | 12 | 13 | 18 | 20 | 19 | 18 | 19 |
|
S8
|
 Thorn Beta 5 (new)
|
20 | 17 | 19 | 16 | 18 | 15 | -4 | -2 | -5 | -6 | -3 |