The XK K123 micro size scale AS350 helicopter has a power plug outlet on the board to run a white LED, just like the K124 does. Here are some LED ideas & tips if you wish to make or install your own LED/s in your K123. Amazon links below...

Stock K124 white LED:
https://amzn.to/2ShWsMl

Various parts for your own K123 LED project:
1. Basic LED assortment set:
https://amzn.to/2PN0x9w

2. Picoblade 1.25mm 2pin connector set:
https://amzn.to/2MhKQoM

3. 30AWG magnet wire:
https://amzn.to/2ZnnVOk

4. 51 ohm resistors:
https://amzn.to/2saKlpC

5. Red flashing 3mm LEDs:
https://amzn.to/2PPSglr

6. White flashing 3mm LEDs:
https://amzn.to/2EIWS6y

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