Abstract: A tool display box includes a casing and a plurality of display seats. The casing defines a receiving chamber, and has a top opening, two spaced-apart first sidewalls extending upwardly from a bottom wall, two spaced-apart second sidewalls interconnecting the first sidewalls, and two spaced-apart first guide rails provided respectively in inner wall faces of the side plates between the top opening and the bottom wall. The first guide rails extend parallel with the bottom wall. The display seats are disposed removably in the receiving chamber. Each display seat includes two opposite sides formed respectively with slide members engaging slidably the first guide rails, and a plurality of tool holes formed between the opposite sides.

Abstract: A technique is described that facilitates sensing current through a load. A method according to the technique includes mounting a discharge lamp in a floating point configuration, sensing current through the discharge lamp, and controlling current through the discharge lamp to improve power conversion efficiency. A device constructed according to the technique may include two AC voltage sources that are out-of-phase with respect to one another. A current sense circuit may be coupled between the AC voltage sources. When a load is connected to nodes of the AC voltage sources, the current sense circuit may sense current between the nodes that is associated with, or perhaps approximates, current through the load.