Here is a brilliant video from Gary Hall lighting a road repair diorama. It uses both flashing LEDs and a flasher chip to produce two different flashing effects and has standard LEDs for the other lights. Thanks Gary!
Order products here:
Self flashing LEDs: https://www.smallscalelights.co.uk/product/0805_flashing_pre-wired_led
Flasher chip: https://www.smallscalelights.co.uk/product/flasher_chip