This simulator replicates the older-style signal and hazard warning flashers that used incandescent (filament) lamps to generate light. Typical flash rate of 3/4 second with an increasing and decreasing brightness curve to duplicate that of filament type lamps. Three outputs will each drive up to one pair (wired in series) of red and/or yellow LEDs Outputs flash sequentially so the module could also drive a very short series of "chase" lights.