The best replacement for strobe light is continuous light.

The best alternatives to strobe light are rated as following:
★★★★★  continuous light
★★★  speedlight

Your alternative for strobe light is not listed? Suggest!
Speaking about strobe light, one probably shouldn't forget about siren.

Other search terms related to strobe light and their ratings are:
★★★★★ siren
★★★ horn
You have in mind a companion for strobe light and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of strobe light in all years. Click on graph for more.
strobe light
continuous light
speedlight