Thorn

50 Watt

'Kolorlux'; date code '60' - December 1986 (Leicester, England)

80 Watt

'Kolorlux'; date code '15' - March 1975 / 1983 (Leicester, England)

With thanks to Brian Randall for donating this lamp.

Late 1980s' / early 1990s' example (Spandau, Germany)

125 Watt

'Kolorlux'; date code '16' - April 1975 / 1983 (Leicester, England)

With thanks to Brian Randall for donating this lamp.

250 Watt

MB/U lamp - Date code '48' (December 1977) - Leicester, UK

'Kolorlux' - Date code '50' (February 1978) - Leicester, UK

400 Watt

MB/U - perhaps intended to be exported as I've never come across these warning labels on a lamp carton before! (1986; Leicester, UK)

Thanks to Colin Grimes for identifying this lamp as one intended for military use - the code '5L 9966771' (not visible here) is a military NATO number, listed in the Defence Standards (DEFSTAN) publication which is described as 'N.S.N. 6240-99-996-6771, Mercury Lamp - Street Lighting, 200/250 V, 400 Watt, E40 cap, Clear'. Another code, '16MU' is the Military Unit for RAF Stafford where the NATO stores are based.

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