It could be the 'low level' light for the windscreen washer bottle.
light waves
Quicksilver maybe? It looks to have waves and is a surfing brand :)
10 facts about the wave painting by hokusia
the bottle will move with the water in a circle
fluorescent lights
Send him brain waves
It depends on what type of wave you are drawing. In Science, there are saw-tooth waves, sine waves, and many others. Each one looks different.
There are several warning lights on a Pontiac Sunfire. They include one for the engine coolant temperature, which looks like a thermometer. There is one for the battery charging system, which resembles a battery. There's one for the brakes, which looks like an exclamation point in a circle. There is one for low coolant which looks like three little waves in a box. There is one for the engine oil pressure, which looks like a teapot with a drop leaving the spout. Finally, there is one for the anti-lock brakes, and that has the letters ABS surrounded by a circle.
House lights radiate energy as electromagnetic waves in the wavelength bands of heat and visible light.
ultraviolet
monochromatic light or Polarized Light
a heart,lights,music,electromagnetic waves,your head [when you have a splitting headache]