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C.A. Calistru, U. Pont, A. Mahdavi:
"Estimation of electrical lighting energy use in buildings: A method comparison";
Talk: BauSim2014 - Human-centred building(s), Aachen, Deutschland; 2014-09-22 - 2014-09-24; in: "BauSim2014 - Gabäude für Menschen", C. van Treeck, D. Müller (ed.); Eigenauflage mit wissenschaftlichem Lektorat, (2014), ISBN: 978-3-00-047160-5; 6 pages.

To satisfy the requirements of users in buildings, the
visual environment needs to meet certain conditions.
Specifically, adequate illuminance levels must be
maintained dependent on the rooms' function and
usage. Toward this end, electrical lighting must be
deployed in many instances. However, the use of
electrical lighting and the associated electrical energy
use can be reduced by appropriate utilization of
daylight. To estimate, in a convenient manner, the
electrical energy use for lighting in buildings, there
exist a number of simplified procedures. An example
of such a procedure involves the use of the indicator
LENI (Lighting Energy Numeric Indicator). Using
such indicators, area-related electrical energy use can
be calculated on a room by room basis. However,
such procedures involve a significant number of
simplifications with regard to building geometry,
properties of relevant building components (e.g.,
windows, shading), climatic context, and use patterns.
In this context, the present paper explores the
reliability of such procedures as compared to the
results that can obtained using more detailed
(simulation) methods. Toward this end, we compare
for a sample of rooms (e.g., lecture room, office
space) the results obtained by simplified and detailed
methods in view of electrical energy demand for
lighting in buildings. The research results are
expected to further define the degree to which
simplified calculation results could deviate from
more detailed estimations of daylight availability in
architectural spaces the corresponding implications
for electrical lighting usage.

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