How can fluorescent lamps (FL) be used? digitalSTROM Support September 24, 2018 06:06 Updated Follow GE-KL200 should be used to do so. Related articles How is it possible to use energy saving lamps (ESL)? How can I use high voltage halogen lamps? Is it also possible to use 3-phase (400V) external conductors? How many filters dSF need to be installed? How can I switch/control sockets?