Final Report Lot 9: Public street lighting - Amper

5.4 BaseCase stock
The results in the following chapters are given per average Base Case (unit) product, per
category. In order to compare results between categories (F, M, S) it is necessary to take into
account the functional unit in lumen (lm) per base case product as indicated.
5.4.1 Product-specific Inputs
The inputs are identical to those of new sales (see section 5.3.1) except for the average
composition of the stock, which is given in tables 2 to 4 of section 5.1.1. There are two
exceptions: technical input parameters LMF and UF in stock luminaires are considered 97,5%
of LMF and UF in new products (sales). This ratio is assumed similar for all single base case
luminaire configurations.
This results in the following:
per BaseCase luminaire, category F (stock):
• annual lamp replacement of 0,29 lamps/yr
• installed power of 256 W
• functional light output of 8861 lm
per BaseCase luminaire, category M (stock):
• annual lamp replacement of 0,33 lamps/yr
• installed power of 277 W
• functional light output of 3738 lm
per BaseCase luminaire, category S (stock):
• annual lamp replacement of 0,33 lamps/yr
• installed power of 97 W
• functional light output of 1038 lm
Note that the increase in installed power per luminaire in ‘sales’ base cases compared to ‘stock’
base cases (and thus electricity consumption) can be largely explained by the demand for more
light output (lm). ‘Annual lamp replacement’ doesn’t change much compared to ‘sales’. It
decreases slightly as HPM are being replaced with HPS that have a longer service life.
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