Expanding the OPTOTRONIC power-supply series is what the company claims is the industry’s smallest Class 2, 100W/24V 0-to-10V dimmable LED power supply. Safe for use in damp locations, it operates on 120V through 277V supply currents. The OPTOTRONIC 100W supply is compatible with popular analog dimmers and its shape and size are similar to a T8 fluorescent ballast at 9.5 x 1.68 x 1.17 in., making it viable for retrofit installations. OSRAM SYLVANIA, Danvers, MA. (978) 777-1900.