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八年级《物理》(人教版)下册第45页的图8.2-5是一幅节能灯的图片,图片下有文字说明:这支功率只有11W的灯管,亮度相当于60W的白炽灯.
Figure 8.25 on page 45 of the eighth grade “Physics” (PEP) is a picture of an energy-saving lamp. The picture below shows the text: This lamp has only 11W lamp, and its brightness is equivalent to 60W incandescent lamp. .