Philips SL 240V 12W BC PRISMATIC : Amazon.co.uk: Lighting
Philips SL*9 CFL with black base, early rare example of original CFL or energy saver design dating back to early 1980s, later lamps had a white base Stock Photo - Alamy
PHILIPS 9W 240V BC SL COMFORT ENERGY SAVER LAMP CFL WARM WHITE | eBay
David Savery Electrical Services Ltd. - My exciting historically significant light bulb!
PHILIPS CFL ENERGY SAVER SL LAMP | eBay
Philips SL*18 Demonstration Lamp
David Savery Electrical Services Ltd. - My exciting historically significant light bulb!
Integral compact fluorescent lamp | Smithsonian Institution