NRG Safe solar powered LED safety markers come in 5 colors and can be modified to flash.
White, Yellow, Red, Green and Blue.
You can choose single sided with 3 LEDs, or double sided with 6 LEDs.
You can also opt for a different color on each side.

White, Yellow, Red, Green and Blue.
You can choose single sided with 3 LEDs, or double sided with 6 LEDs.
You can also opt for a different color on each side.