greqat pic.....you wanna know what that puple is? the camera can "see" very well into the infrared spectrum of light, digital(mostly Sony)cameras are very good for ir photos. those coals are so hot the camera picksup the ir energy from them. Ir has no color and invisible to the human eye. You feel it on a sunny day though, as heat from the sunlight on your skinThe camera gives it a color, always purple. I primarly take lowlight and IR pics....i use an Infrared pass filter to block all normal light and only allow ir light thru it. theres ir block filters u can buy to block all the ir light as well. hope this info helps... Mike