Abstract: A lighting system having a controller, a plurality of lights, and a bidirectional bus interconnecting the controller with the lights. The controller controls of the status of the various lights including the on/off state and intensity of the light by transmitting not only commands along the bidirectional bus, but also the address of the individual lights along the bus to the lights. This address is decoded by a circuit associated with each light to permit the lights to be individually controlled if desired.

Abstract: An industrial sized drum that may be blow-molded of polyethylene is constructed with integrally formed rolling hoops, a domed top having an interrupted chime of generally arcuate cross-section undercut on its interior side, necks extending upward from a pair of diametrically opposed bungholes, symmetrically disposed dimples in the drum top adjacent these necks to maintain ovalization. The necks are formed to facilitate crimp-type securement of closures by crimp-type techniques. The drum bottom is formed with a chime and a sump pad aligned with one of the bungholes.