| abstract |
A fluorescent lamp that effectively promotes photosynthesis and growth of plants, has a good luminous flux maintenance factor, and can improve the lighting environment of an operator. A translucent glass bulb 2; a phosphor layer 6 formed on the inner surface of the glass bulb and composed of a blue light emitting phosphor, a green light emitting phosphor and a far red light emitting phosphor; An enclosed discharge medium; and a pair of electrodes 5 and 5 sealed at both ends of the bulb. [Selection] Figure 1 |