I r4ecently noticed a neuighboring town is switching their street lights from sodium and mercury vapour to LED street lighting. Now, my city is changing over from sodium vapour to LED's. Most of the streets in my area have already been switched over to LED's. My street will probably be changed over from Sodium to LE over the next week or so. It's kinda sad to see the old cobra head sodium vapour lights disappearing. I remember back in the 1980's when were were on incandescents and they switched to sodium vapour lighting. Now sodium vapour is obsolete and LED's are in. The times they are a changin.