
E-Mark & ECE Lighting Guide: How to Read Headlight and Taillight Markings (HCR, DCR, RL, Arrows, Reference Numbers)
Decode every marking on an ECE-approved lamp: what the E-number really means, why HCR is not "halogen," what the arrow and reference number control, taillight and indicator codes, the R48 rule for DRLs and indicators, and what an E-mark does not guarantee at inspection.
EleronOctober 2, 2025
6 min read9854 views
