Ash Barnett:
...Do LED tats still cost essence in 5e?
Chrome Flesh pg. 109 introduces bio-tattoos that cost 0 essence for 500¥ but you can't turn them off (but you can always just cover them up to negate the sneaking penalty).
Crome Flesh pg. 73 has LED Tattoos in small (0.05, 100¥) medium (0.10, 500¥) and large (0.20, 1,000¥)
The upside to LED tattoos is you can download new colors and patterns while bio-tats are set in stone once you get them but are cheaper and essence free.