The answer to 'surge protector dimming lights' is that a surge protector can sometimes cause lights to dim or flicker. This is usually due to the surge protector's internal components filtering out electrical noise and voltage fluctuations, which can inadvertently affect the voltage supply to your lights.
The most common symptoms are lights that dim, flicker, or pulse when the surge protector is in use. This is more likely to occur with older or cheaper surge protectors, or if the surge protector is overloaded with too many devices. In most cases, this is not a serious issue and can be resolved by upgrading to a higher-quality surge protector or moving the surge protector to a different outlet.