| 摘要 |
A lamp unit for a ceiling light fitting has a lamp holder and a cooling body 4 serving to cool LEDs held by the lamp holder. The cooling body 4 comprises several cooling channels 9 framed by walls 6, 10, 11, that are open at both ends and are arranged around the lamp holder. The cooling channels 9 vary in cross sectional area from the lamp holder end to their opposite end. A motor driven fan may be provided (Fig. 7). |
