How Long Will a Car Turn Signal Bulb Really Last?

How many times can a car turn-signal bulb blink before it finally dies? I decided to find out. I built my own endurance test setup and put a brand-new automotive incandescent turn-signal bulb through a long-term test. The bulb was tested at approximately 14.3 V and blinked at around 1 Hz, using a repeating pattern of different ON/OFF intervals designed to simulate more realistic usage rather than simply leaving it on continuously. And the result? 700,000+ blinks before failure. But I wasn't satisfied with just one test... I also tested another brand-new bulb continuously at around 1 Hz as an endurance benchmark — and that one survived approximately 4,000,000 cycles! The continuous test isn't meant to represent normal driving conditions. It's simply a way to see what the bulb can endure when subjected to constant cycling. This is the first endurance test on the channel, and I plan to test many more things in the future. If you enjoy DIY experiments, endurance testing, electronics, automotive stuff, and finding out how long things actually last, consider subscribing. And yes... even the light I was using to illuminate the test setup eventually burned out. Maybe that's the next test. Chapters : 0:00 - 0:51 Introduction 0:52 - 3:29 Block Diagram 3:30 - 4:30 Blinking Bulb basics 4:31 - 4:44 Testing rig built 4:45 - 5:41 Testing rig working 5:42 - 6:21 Failed bulb simulation 6:22 - 13:45 Continuous mode testing 13:46 - 14:47 Continuous mode results 14:50 - 15:35 Bulbs comparison 15:36 - 21:48 Discontinuous mode testing 21:49 - 22:35 Discontinuous mode results 22:36 - 25:48 Conclusions and quick math