this post was submitted on 12 Nov 2023
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Easy difficulty: arduino + LED strip
Medium difficulty: cheapest stm32 + LED strip
Hard difficulty: cheapest chinese 8051 microcontroller + LED strip
Electric difficulty: timer relays + regular lightbulbs
Novichok: discrete logic + opamp + lots of passive components + LED strip
Soviet engieneering: discrete logic + opamp + lots of passive components + thyristors + light bulbs
I was about to suggest photoresistors/photodiodes for the lolz. I must be a communist.
Kolhoz engieneering