I specifically chose it over the PC series because I wanted one with just a HIGH and LOW. Generally I avoid lights with a zillion different modes; I don't want them or need them, and they drive up the price of the light and make it harder to use IMOHO. So far I've never once used SOS or strobe nor wished I had them. I guess I can imagine a scenario where they'd be useful but when it comes to light I like the KISS approach!