Snappy opto constant voltage led drivers sph250 series snappy psu sph250 12b the snappy optoelectronics psu sph250 12b is a constant voltage led driver from the sph series this led driver is ip67 rated with a power rating of 250w it complies to international safety and emission standards the led driver features inbuilt openshort circuit protection overload and overheat protection the psu sph185 12b is a three in one dimmable version denoted by the suffix b after the manufacturers pa