| 摘要 |
A lighting device may include a circuit board with at least one LED chip thereon, sidewalls extending from the circuit board, and a phosphor cover supported on the sidewalls, wherein the circuit board, the phosphor cover, and the sidewalls define a cavity accommodating at least one LED chip, wherein the lighting device further comprises at least one optical member arranged in the cavity, and the optical member has an adjustable reflectivity to adjust the spectral power distribution of emitted light through the phosphor cover and/or the CCT of the emitted light. |
