(19)

(11)

EP 0 389 542 A1

(12)

(43) Date of publication: 03.10.1990 Bulletin 1990/40 (21) Application number: 89900106.0 (22) Date of filing: 25.11.1988

(51) International Patent Classification (IPC):  G05B 19/ 042( . ) H05B 37/ 02( . ) G05B 19/ 10( . ) (86) International application number: PCT/GB1988/001029 (87) International publication number: WO 1989/005086 (01.06.1989 Gazette 1989/12)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 25.11.1987 GB 19870027605 (71) Applicant: ADVANCED LIGHTING SYSTEMS (SCOTLAND) LIMITED Edinburgh EH7 5HD (GB)	(72) Inventors: MUNRO, Neil, Lennox Edinburgh EH7 5HD (GB) Mc PHAIL, John Edinburgh EH7 5HD (GB) (74) Representative: Horner, Martin Grenville  Cruikshank & Fairweather 19 Royal Exchange Square Glasgow G1 3AE Scotland Glasgow G1 3AE Scotland (GB)