Yes its possible to get headaches from looking at light emmited through a wave-generated ballast, depends on the persons health and sensitivity to light and frequency (i can see the flicker, some cant)
Its also possible to have sleep interruptions,anxiety ect with high amplitude infrasonic emmisions but it will take more then 250watts lol(basically extremely rare) because anything that puts out that amplitude of noise is usually over 2000+ watts and cant run for continuous period of time, most likely your freaking out.