Philips SL13 Watt spaarlamp fluorescent with integral ballast
LUXRITE 13-Watt 4FT Linear T8 LED Tube Light Bulb 3 Color Selectable Single and Double End Powered 1950 Lumens F32T8 25 Pack LR34237-25PK - The Home Depot
RARE Vintage Philips Holland ES E27 SL Prismatic 13w Low Energy Bulb NEWBOXED 8711500701992 | eBay
Lighting-Gallery.net - My CFL Lamp collection/Philips SL 13 Lit with Plasma lamp.