YOU SAID:
Beware that the light is fading;
INTO JAPANESE
光が消えていることに注意してください。
BACK INTO ENGLISH
Note that the light is turned off.
INTO JAPANESE
ライトがオフになっていることに注意してください。
BACK INTO ENGLISH
Please note that the light is off.
INTO JAPANESE
ライトが消灯しているのでご注意ください。
BACK INTO ENGLISH
Please note that the light is off.
That didn't even make that much sense in English.