2018 around 5pm and visibility was poor which caused this mistake. I was about 5 cars away from the traffic light and did not realise the sign.
What should be my course of action ?
Your help is appreciated
Poor visibility is brought up quite a bit here and it's almost never a valid defense. If your visibility is so bad that you're missing signs, then you'd be expected to pull over safely and figure something else out. It's not an excuse to drive blindly.