dimplex prism series 74" wall-mounted linear electric fireplace with acrylic ember bed (blf7451) dimplex the best-selling electric linear fireplace just got better with the all new prism series. sparkling with intensity in a full spectrum of rgb colors, the prism effect illuminates the diamond-like acrylic ice ember bed in a show-stopping effect. complete with a powerful and efficient fan-forced heater, this fireplace adds comfort and ambiance to any space. plugged in or hard-wired, hung on the wall or built-in; the prism series is beautifully versatile.