The widespread introduction of LED lighting is expected to reduce greenhouse gas emissions because white LEDs will be the most efficient light sources in the near future. This paper describes trends in emission of greenhouse gases in Japan and compares the CO 2 emission of LED lighting with conventional lighting.[3] Japan Electric Lamp Manufacturers Association,
Self-ballasted compact fluorescent lamps (CFLs) have been developed and improved in these twenty years. In Japan, the CFLS that have diffusive glass globes to replace incandescent lamps have been developed, but their sizes were too large to fit in the luminares of incandescent bulbs. Thus, we have developed the self-ballasted CFL of an "A60" bulb shape, which has the maximum diameter of c60 mm and the length of 123 mm. This lamp could be substituted for a 60 W incandescent lamp. In order to realize this lamp size, we opt.imized the discharge tube diameter, filling gas type and pressvre, the shape and makmg process of the dlscharge tube After all the tnple "U" connected tube Is selected, which has a decisive advantage against a multi-folded tube on the luminous maintenance during life, but also has a disadvantage on the luminous run-up characteristics. We investigated the behaviors of mercury, especially the mercury diffusion phenomenon released from the auxiliary amalgam-Wags after ignition by both experiments and calculation. The luminous run-up characteristic has been much improved.
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