ST8201-CS 880912September 12, 1988
Nr. Steve Goram
City of Coppel!
Post Office Dox 478
Coppell, Texas 75019
Dear Mr. Goram:
Enclosed is information you requested pertaining to the G~_nmrnl
_Electric Decmmhi~lR rl 1,,=i~aire. TU Electric is offering this
as un ~~Y I i ght foA~.tkO2_Emercia[ areas and ma_lox.,
_tl?_r_oughf_ares. The photometric applications data on this style
of light is ve, ry similar to that of the gin street light. (See
attached 'photometric' data.) As this data indicates, these lights
can be used on major thoroughfares wiLhout any difference in the
footcandle lighting or uniformity ratio when compared with the
gin street light.
I/hereus tile ~.~,~__h_[? ara onodize~[ .~l,tm_inun~ ' in
Al~i-aJ-iA~, the G. General Electric ~J.gllt standard req ' · ' t'n .
There are qO othe_v_~JLo.tj.r~able differences, between the gin light
and the General Electric light.
Tile ~ct_~Lj~g_J_j~hJ~can be _in~[nl leal for an approximate
charge of $1,340.00 for each 30 fooL', double fixture stree~t
~igh[.. Tll~ cos[. ~r the ~ul, le fixture Kin light install~ in
similar manner ~$3~220.00~ Credits Can be applied to-these
prices for custom~ installe~ foundations and conduit.
If you have any---~ques~ions concerning this mat~er, please call
Brancheau at 323-8910~.
. "~.~ .l~ I
Sxncerely, xX .~ o
Thomas G. Parsons
District Manager
a
Tim
TGP/TB: rm
Enclosure
.'DS-400 Ltl40 ~- L0200
PHOI'OMETRIC JS-177J15 27000 LOMENS
ROADWAY WII)IH: 34.0, HI-I: ~.0.0
MEDIAN WIDTH = ;~4.0, HEDIAN SETBACK = 10.0
SPACING-- I:~0 HEDIAN (iNLY
34.00 0.51 0.5'J' 0.76 0.95 J..24
27.20 0.47 0.52 0.65 0.82 I. 11
20.40 0.41 0.45 0.55 0.69 0.95
13.60 0.35 O. 3:[: 0.46 0.59 0.79
6. :~:0 0.30 0.33 0.40 0.49 0.64
0.00 0.26 0.2C: 0.35 0.40 0.
:~: :~: ~: :~:
0.0 9.0 J. E:. 0 27.0 36.0
I L L DM I N ANCE SOMMA R Y
HORIZON'rAL GRID SPACING 9.00
MAXIMUM GRID POINT VALUE 7.86
AVERAGE OF 66 GRID POINTS 1.71
UNIFORMITY RATIO MAX/HIM 30.22
1.77 2.47 3.36 5.JO 7.07 7.86
1.54 2.23 3. [13 4.33 ,'3.53 5.93
1.33 1.91 2.61 3.45 4.12 4.22
1.13 1.. 4E; 2.05 2.53 2.E:7 2.92
0.¢33 1.07 I .41 ! .77 1.95 1.92
[).6] 0.74 0.92 1.I2 1.2[~ I.~5
45.0 54.0 6~.0 72.0 ()1.0 90.0
VERTICAL GRID SPACING 6.E:O
MINIMI.IM GRID POINT VALUE 0.26
IlNIFORHITY RATIO AVG/MIN 6.57
NO. OF LOHINAIRES USED 8.00
Normal deviations in luminaire installation, lighted area geometry,
electrical supply, lamp tolerances, luminaiKe tolerances, armd obstructions
withJ, r, the lighted space IllaY produce illumir,atior, levels different fl'Olll the
above predicted wa].ues.