Final Report Lot 9: Public street lighting - Amper

sales can be derived from the “Apparent consumption 22 ” (for which it provides the necessary
data - both in physical and monetary units), it does not provide data on the stock of products
already in use (or “Installed Base”), nor does it say anything about the average product life,
which would help in calculating that stock. Furthermore an important shortcoming of the use of
Europroms as data source is that production and trade data on lighting parts (such as lamps and
ballasts) are not available at the desired level of detail (i.e. only data available at a very high
level of aggregation, thus including other lighting categories). Last but not least, for several
technical reasons, the Prodcom data have a limited reliability and –if one wants a reasonable
coverage of data of all Member States—runs several years behind.
For these reasons we will have to estimate the total street lighting market using other indirect
sources of information. The detailed approach in described in section 2.2.
22 One of the most important indicators provided by Europroms is “Apparent consumption” - the estimation of the
amount of each product consumed in a country based on the amount produced plus the amount imported minus the
amount exported. This is the rationale for combining Prodcom and Foreign Trade data in Europroms (Eurostat
Data Shop Handbook, part 6.4.2 Europroms-Prodcom data, version 29/08/2003).
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