For each new development we have increased our understanding of light, providing the stimulus for new solutions which deliver good, energy efficient, lighting for humans. A lot of the new findings have forced us to learn and re-think what we knew during the years.
Compact fluorescent lamp
In mid-eighties there was a new light source on the market, the compact fluorescent lamp. Suddenly we were able to make energy efficient lighting with smaller dimensions such as downlights and wall luminaires. It was an intensive light source and there was a lot of light that had to be taken care of. This little light source could have a luminance (light intensity) up to 40.000 cd/m2! Basically we had the energy efficiency of a fluorescent tube in a miniature size. The new light source suddenly became an alternative to the traditional bulb in a lot of applications and led to a whole new range of stylish fittings.
In the very first Pleiad downlighter that was released in mid-nineties we developed a symmetrical light distribution from a horizontally positioned lamp. Why horizontally? We simply wanted to keep the recess depth as low as possible since there often is a lack of space above the suspended ceiling. With a lot of engineering skills we designed a reflector with symmetrical light distribution with excellent cut-off from the horizontally positioned lamp! When others made cut-outs in the reflector for lamp switch we made a toggle solution for that in order to get the most light out of the Pleiad.
In the early nineties we also got the electronic, high frequency ballasts resulting in increased energy efficiency and a flicker-free light! At Fagerhult our big issue was controlling the heat on the ballast since heat kills electronic devices. After some years we introduced our own policy regarding thermal control and stated that we should always have at least a 5 °C margin to the stated TC-point on electronics.