The arc of my Osram NAV-TS 70W Super 4Y
This is through my ND1000 filter. The arc is stabilized by the arctube wall.
Strange that this is occurs also with white SON lamps, which have shorter and larger arctubes.

The arc of my Osram NAV-TS 70W Super 4Y

This is through my ND1000 filter. The arc is stabilized by the arctube wall.
Strange that this is occurs also with white SON lamps, which have shorter and larger arctubes.

1459362659612.png DPP1035.jpg IMG_8119.JPG IMG_20150827_174729.jpg IMG_20150919_193016.jpg
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