Abstract: An exercise apparatus includes an exercise device, a memory including a first memory portion, and a receiver for receiving exercise programs transmitted over a first communication link. A control unit supplies received exercise programs to the first memory portion for storage in the first memory portion as first exercise programs and selectively controls the exercise device in accordance with the first exercise programs.

Abstract: An exercise apparatus includes an exercise device and a control unit having a port for receiving a portable memory module storing one or more exercise programs, selecting circuitry for selecting exercise programs stored on the portable memory module, and a processor for executing a selected one of the exercise programs to control the exercise device.

Abstract: A fluorescent lamp having an adjustable color temperature comprising at least two elongated fluorescent discharge tubes (10 & 20), one tube (10) having a larger diameter than the other (20). The tubes (10 & 20) are assembled into a single unit. A groove (12) is disposed within the larger tube (10) and runs parallel to the longitudinal axis. The smaller diameter tube (20) is snugly nested within the groove (12) and in intimate contact with the larger diameter tube (10). The larger diameter tube has a phosphor coating producing one color temperature and the smaller diameter tube produces a different color temperature. Preferably, the larger tube has a phosphor coating that emits a low color temperature of 3000.degree. K. or below and the smaller tube's phosphor coating emits a high color temperature of greater than 10,000.degree. K. A controller divides the power to the two tubes such that a variable color temperature is produced at nearly constant total power.

Abstract: In a metal halide arc discharge lamp having a light emitting arc discharge tube surrounded by a heat absorbing, light transmissive shroud hermetically sealed within an outer lamp envelope, more nearly isothermal operation of the arc tube surface is achieved by using a shroud having a geometry (e.g., a hollow frustum of a cone) such that the shroud is closer to the cooler portions of the arc tube than to the hotter portions. At steady state lamp operation, the shroud absorbs heat emitted by the arc tube and radiates a portion of the absorbed heat back to the arc tube. By having a shroud geometry and spacing such that the inner surface of the shroud is closest to the coolest portions of the arc tube and furthest away from the hottest portions of the arc tube, the shroud radiates more heat back to the cooler portions, thereby providing more nearly isothermal operation of the surface of the arc tube than can be accomplished with a coaxial, cylindrical shroud or no shroud.

Abstract: A compact fluorescent lamp has a pair of fluorescent arc tubes (16, 18) dosed within a spherical bulbous, translucent envelope (24). The arc tubes (16, 18) are substantially U-shaped and are oriented such that one leg of the U-shape of an arc tube extends between the legs of the other arc tube. The arc tubes (16, 18) are connected to a single ballast to provide power to the lamp.