PURPOSE: To prevent any flickering which might occur during d.c. lighting of a compact-type fluorescent lamp by providing the anode-side portion of a double- U-shaped emission tube with a part spatially connected to the outer tube globe and charging the emission tube with mercury and a rare gas mixture composed of neon and argon.

CONSTITUTION: A double-U-shaped emission tube 1' contains electrode coils 4 and 5 in its ends and the inner surface of the emission tube 1' is coated with a phosphor 6. After the emission tube 1' is installed in an outer tube globe 3, the globe 3 is charged with mercury and a rare gas mixture composed of neon and argon thereby constituting a compact-type fluorescent lamp. The emission tube 1' has a connecting part 13 which is located near the electrode 4 and spatially connected to the outer tube globe 3. Lighting of the lamp is performed with a d.c. power supply 15 by using the electrode 4 and an anode and a resistance 14 as a stabilizer. Therefore it is possible to prevent any flickering which might occur due to cataphoresis caused at low temperatures by selecting the rare gas used. Besides it is also possible to reduce the total weight of the lamp by simplifying the stabilizer.