Final Report Lot 9: Public street lighting - Amper

Category S
In road category S (slow traffic), mainly sodium and mercury lamps are used and to lesser
degree compact fluorescent and metal halide lamps. Typical wattages used are 125W HPM,
50W, 70W HPS, 70W MH and 36W CFL. In the stock of luminaires also 35W, 55W LPS can
be found, but these represent minor shares and are being replaced with other lamp types. HPM
are also being replaced but represent still a substantial share in the installed base. 125W HPM,
70W HPS, 70W MH and 36W CFL are taken as representative lamp types for category S street
lighting. For the BaseCase calculation we assume for the existing stock of luminaires 2005 a
weighted ratio of 57% HPS, 32% HPM, 9% CFL and 2% MH. For replacement sales,
luminaires are replaced with luminaires of the same type. For new project sales we assume 50%
HPS, 30% HPM, 15% CFL and 5% MH. These ratios are based on generic market data (see
chapter 2) and expert assumptions since no other detailed reliable market data are available.
The table below gives an overview of the input data for luminaire types, category S.
Note that at installation level, different amounts of these lamps are required per km to achieve
similar minimum illuminance levels (between 2 and 10 lx for road category S). The following
typical pole distances are defined for these luminaires (see section 4.3.1.4): HPM 15m, HPS
30m, MH 20m and CFL 15m.
As according to the technical analysis on lamps (see section 4.3.1.4), a 125W HPM lamp has an
efficiency (ηlamp) of 51 lm/W, 70W HPS 88 lm/W, 70W MH 90 lm/W and 36W CFL 80 lm/W.
In the BaseCase, these lamps are accompanied with electromagnetic ballasts, with efficiencies
of 91% for HPM, 84% for HPS, 84% for MH and 80% for CFL.
Table 74: Luminaire types in category S
Luminaire types, CAT S Stock
Sales, New
project
Sales,
Replacement
Sales,
Total
With Mercury lamp 32% 30% 32% 31%
With Sodium lamp 57% 50% 57% 53%
With Metal Halide lamp 2% 5% 2% 4%
With CFL 9% 15% 9% 13%
Total 100% 100% 100% 100%
5.1.2 Environmental Impact (per unit lamp, ballast)
The table below gives the environmental impact, by multiplying the inputs with the Unit
Indicator values from chapter 5, MEEuP Report.
Note that the use phase impacts are only mentioned informatory in order to compare the
impacts of the lamp and ballast (per one unit) with that of the entire product over its life
(electricity use over lamp life service (resp. 2,3 or 4 years)). In section 5.3 to 5.4 on BaseCase
assessments at product-level, the lamp & ballast replacement over luminaire life are taken into
account.
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