This is a fundamental building material for use in scratch-building or customizing models.
This handy little circuit from HiQParts' One-Touch LED series will make your model or figure's light(s) flash. It's extremely easy to use requiring no prior knowlege.
It connects between a battery with optional switch (sold separately) and an LED light (sold separately). If you connect a three-branch harness (sold separately) between the connectors, you can flash multiple lamps at the same time.