Category8 articles
Luminous efficacy, LED reliability and evolution, IP and IK ratings, colour temperature, DALI and KNX controls, energy savings and CEE schemes.
LED performance and controls
Colour temperature is decided when the order is placed, not up in the cherry picker: once the luminaires are installed, going back means taking the ceiling down again. Here is the selection rule by type of space, the limits that apply outdoors and the situations where mixing two shades really causes problems.
6 min read
LED performance and controls
Three CEE lighting schemes disappeared in February 2026. An overview of the operations still available, the RAI rule and the timetable to follow.
10 min read
LED performance and controls
Understanding IP and IK ratings: full tables, standardised tests and the IP/IK pair to choose for your application.
11 min read
LED performance and controls
Definition of luminous efficacy in lm/W, why aim for 200 lm/W and its key role in solar photovoltaic installations.
7 min read
LED performance and controls
L70/L80/B10, MTBF, thermal management, drivers, IP/IK and warranties: the practical criteria for judging the reliability of LED lighting and its supplier.
6 min read
LED performance and controls
From the Nobel-winning blue LED to 200 lm/W, tunable white and IoT: a look back at the evolution of LED lighting technology.
6 min read
LED performance and controls
DALI, KNX, presence detection, dimming and supervision: the guide to lighting control systems for a high-performance B2B installation.
5 min read
LED performance and controls
Presence detection, dimming and daylight: what realistic savings and what ROI for intelligent lighting? Method and worked examples.
5 min read