The 16th century witnessed first attempts on the way to permanent public lighting. From pitch-pan lamps and pinewood chip lamps via oil and gas lamps through to carbon arc lamps.

Outdoor lighting was subject to radical changes until the mid-19th century. Carbon arc lamps proved unpopular and were replaced first by incandescent light bulbs, then in the 1930s by mercury-vapour lamps and  fluorescent bulbs.

For the latter from the 1950s TRILUX marketed outdoor luminaires with simple metal reflectors for light control. The oil crisis in the early 1970s then accorded greater emphasis to energy saving and light efficiency. Which resulted in improved street lighting and better light control. In about 2000 TRILUX used enhanced computer

programmes with 3D simulations to optimise the reflectors, resulting in freely shaped reflectors and greater efficiency. This lighting technology was miniaturised for LEDs, and efficiency increased again thanks to targeted light using more precise lenses.

This finally led TRILUX to multi-lens technology (MLTIQ), which ensures optimal flexibility, light current, lighting technology and colour plus better energy-efficiency. Consequently, luminaires can be better adapted to customer wishes. A crucial step in the development of outdoor lighting.