Problems with Glare in the standard EN 12464-1:2011 scheme must have uniformity and produce a glare less than 19 to meet every standard produced.
Typical points that seem to come in almost every specification.
Some of the problems are as follows:-
The room to be designed is not a rectangle
The design layout for the luminaires is not a standard array and there are other luminaires in the area.
Computer software will only work on the information programmed.
The information provided by 42 Partners really does highlight how confusing standards can be. We have to set the standards somewhere but not held to ransom in the design of our more unusual shaped buildings.
Problems with Glare in the standard EN 12464-1:2011 Problem 1. Not a regular array The standard says that the table method should be used for determining glare where there is a regular array, but offers little help on how to proceed if there is not a regular array and the table method is therefore inapplicable. "If the tabular method is not applicable and the observer position and the viewing directions are known, the UGR value can be determined by using the formula. However limited research has been done to determine the applicability of existing limiting values. Limits for this condition are under consideration." This means that the UGR limits stated in EN 12464 can only be applied to a regular grid of luminaires. EN 12464 does not give any UGR limits for installations that do not have regular grids.