How to incorporate glare requirements when selecting light sources in office applications
Glare is one of the first elements requiring attention in environments like offices, where both direct and indirect glare can impact visual comfort. The table above makes clear that when it comes to actual working area in offices, light sources need to have a UGR value of 19 or below. In line with this, and also so as to provide a variety of options in terms of archetype, design, and connectivity, the Philips office portfolio includes a variety of luminaires, such as SmartBalance, SlimBlend, and TrueLine (office-compliant version). All have <UGR 19 and eliminate the effects of indirect glare, thanks to their having a value of L65<3000 cd/m2.
Even though a UGR value of 19 is typically accepted in offices, particularly attention-intensive activities such as technical drawing or control room work require lower UGR values for better visual comfort and quality. The Philips PowerBalance luminaire, with UGR 16 and L65<1500 cd/m2, suits such activities with an optimized light distribution that doesn’t compromise lighting design efficiency.
Applying a light source with the correct, and lowest possible, UGR value is an important step towards minimizing the impact of glare in offices. To enhance comfort and limit the phenomenon of glare further, lighting professionals can also consider applying smart control applications such as Philips ActiLume, which automatically adjusts the brightness of artificial light depending on the amount of natural light coming from outside. This further reduces the luminance that can potentially reflect off surfaces such as computer screens or glossy furniture.
In conclusion, visual comfort is crucial to our well-being. In offices and other work environments it’s even more important, as it makes us more productive. Glare, a complex phenomenon that comes in both direct and indirect forms, is a chief cause of visual discomfort – and even visual disability. With the right lighting, however, lighting professionals can mitigate or even eliminate it, improving the environments they’re charged to light and the way that people interact and work in them.