Planned in 2016 by NEMA is a ban to effectively Eliminate Mercury Vapor Lamps,the Preceeding ban passed in 2005 and Effective in 2008 made the sale of Mercury Vapor Ballasts illegal,Mercury Vapor lamps were proposed to be banned due to the fact that they are the least efficent of the HID Lamp Family,these lamps were Invented in 1934 and improvements continued to be made well into the Late 70's and Early 80's,as High Pressure Sodium Started to Become Popular due to its Higher Effiency,older mercury vapor installations were taken down and replaced in favor or newer high pressure sodium systems,while these lamps are more efficent they do come with several shortcomings...firstly the lamps usually cycle at the end of their rated lifetimes,whereas mercury vapor lamps typically dim out,they suffer reliability issues such as leaking,and compleate lamp falliure,the Ballasts and associated Gear required to start the lamp is more complex,expensive and likely to fail,lastly is the disgusting orange light they emit,this lowers visibility and is a hazzard,older mercury lamps emitted a Green Blue Light (From the Clear Lamps) and a Whiteish Light from the Color corrected lamps..this ban is compleatly unacceptable and shouldnt even have been passed,vote today in an Effort to prevent this from happening