Hi everyone, I would like to create a string of festive color bulbs using a battery for power and an ESP32 to control them. However, my challenge is that I want to build my own color bulbs using diodes. My battery is powered by solar panels and provides 5V DC and 4,000 mAh. Do you know if there are any existing bulbs that can be adapted and made waterproof? Or maybe you have some good reference for bulbs. Thanks.
Maybe RTV. Or, I've got a string of little incandescent lights in clear tubing. You could string them through tubing and seal the ends (with RTV, or whatever).
LED = Light Emitting Diode. Regular diodes don't light up? 
If you haven't used LEDs before, "start small and experiment". Regular little LEDs need a current limiting resistor (they are "current operated" not "voltage operated") and high-power LEDs (1W or more) normally use a constant-current driver/power supply which isn't easy to build yourself.
Or there are addressable LEDs with a built-in driver. Most of these are RGB (Red, Bule, Green = multicolor)
You can get waterproof LED strips but the configuration or spacing between LEDs may not fit your needs.
I don't know if this relates to what you're trying to do but Adafruit has LOTs of information about WS2812 addressable LEDs (which they call NeoPixels).
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thanks
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