More accurately described as a compartmentalized borderlight, but colloquially called a or X-Rays, is a linear fixture using multiple MR-16, R-30, R-40, PAR56, PAR64, T-3, A-type or HPL lamps. Portable version are available in lengths of two feet to eight feet. Permanent versions can be any length desired: for use as a borderlight, a length of 3/4 of the stage opening is recommended. Typical uses include cyc or drop lighting and general wash lighting.
Photo of an 8'-0", 16-lamp, 4 circuit, R40 striplight, courtesy of Altman Lighting.
LED products such as Color Kinetics Color Blaze 72, Pixel Pange Pixelline 100, Martin StageBar54, and products from Selador are gaining ground on overtaking traditional striplights.
ColorBlaze 48 from LED Stage Lighting Fixture - Philips Color Kinetics ColorBlaze.
Sometimes confused with chaser strips.