File talk:110213 LED vs Sodium vs Mercury.jpg
Latest comment: 8 years ago by 106.69.242.109
I can only make out two kinds of lights (circled in the linked Google Drive image), which also makes ambiguous which ones they are, as I can't discern which is "foreground", "background", and "middle". Could the lights be labelled, please? https://drive.google.com/file/d/0B8l25jztUsb8MnBQUVh3Zm9OVFU/view
106.69.242.109 (talk) 02:44, 6 April 2016 (UTC)
