| For any of you who always wanted to know how to recognise a type of LPS bulb there is a simple way: Just look at the colour of the base. I believe that is one of the ways I think
-SOX (regular): Brown -SOX plus: Red -SOX-E (efficient): Black -PSG SOX: blue & Green
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Photographer of English streetlights in Rugby, well of course Polish fixtures as well.
I use a Nikon Coolpix P510 42x Optical zoom (16.1 Megapixels) camera to photograph them.