Panasonic (National) EFG15ED/12 Palook Ball Spiral G-shaped, set of 2 Used for 3 months, then stored for about 2 years. No original box, will be shipped in a different light bulb box. This is a used item, so there is no warranty. Operation confirmed. This compact, light bulb-sized fluorescent light bulb uses a spiral light-emitting tube. With a power consumption of 12 watts, it provides nearly the same brightness as a 60-watt incandescent bulb. The brightness immediately after turning on (about 1 second) is approximately 40% (A15 type), a significant improvement. (At an ambient temperature of 25 degrees Celsius) ● Energy-saving: 80% electricity bill reduction, saving on electricity costs when used for 6000 hours. ● Rated lifespan: Approximately 8 times longer, 6000 hours, about 6 times longer than silica bulbs!! ● Top-level luminous flux rise The brightness (luminous flux) of fluorescent lights decreases as the temperature inside the tube increases. To prevent this phenomenon, amalgam was used in conventional light bulb-shaped fluorescent lamps. This amalgam also had the disadvantage of not becoming bright immediately after turning on. The spiral light-emitting tube does not use amalgam because it can reduce the temperature of the coldest point of the light-emitting tube by using a convex part at the top of the light-emitting tube and a heat conduction medium (double-down method). This has significantly improved the brightness immediately after turning on (about 1 second) to about 40%. (At an ambient temperature of 25 degrees Celsius) *However, it takes longer to become bright when the ambient temperature is low. ● Flickering lifespan: Approximately 20,000 times ● Color temperature: Cool color (daylight color): 6700K