While lemon juice can lighten hair slightly due to its citric acid, it's not strong enough to significantly lighten dark hair to blonde. It might make your hair slightly lighter, but it won't be noticeable.
Here's why lemon juice isn't an effective hair bleach:
* Not Strong Enough: Lemon juice is not a strong enough bleaching agent to lift dark pigment.
* Can Damage Hair: Using lemon juice on your hair can actually be damaging, making it dry, brittle, and prone to breakage.
* Uneven Results: It's difficult to achieve even results with lemon juice, as it can lighten some areas more than others.
If you want to lighten your hair significantly, you should consult a professional hairstylist and use professional bleaching products. These products are designed to be safe and effective, and a stylist can help you achieve the desired results without damaging your hair.