The present invention provides an improved lamp, and lighting fixture incorporating such a lamp, wherein the lamp’s envelope includes a special optical coating system configured to more effectively reflect infrared light back toward the lamp filament, thereby enhancing the lamp’s luminous efficacy. A carrier material of at least one polymer layer is directly applied as by extruding to the back side of the top material. The method and system also comprise accessory pulleys coupled to the belt. The web guider controls a position of the substrate in a second direction substantially perpendicular to the first direction. , generated using a flow cytometer, an image analysis system, gene expression, or protein microarrays. A polynomial correction surface is determined based on a pixel array center, height, and width, surface fitting parameters, and pixel coordinates.