Osram Dulux bulbs (CFL) are available in different bases or caps. From the common E14 and E27 to compact fluorescent 2 to 4 pin.
Do you know that you can save between 50 and 80% more on your electricity bill
20w Osram Duluxstar
20w ≈ 100w
Up to 80% less energy consumption compared with ordinary light bulbs