Translation of "Dimmer" in Japanese

This torch is getting dimmer and dimmer.

たいまつが暗くなってきた

Full moonlight is 400,000 times dimmer than the sun. But still enough to see by.

‎満月の明るさは ‎太陽の40万分の１だ ‎それでも視界が開ける

But not complete. The light of the full moon is 400,000 times dimmer than the sun.

‎だが月が出ている ‎満月の明るさは ‎太陽の40万分の１だ