To lighten your hair using lemon juice it needs to be sunny and above 70°
You will need:
Lol thats it.
1) put the lemon juice into a spray bottle (optional) ~
2) every day spray on or drop some lemon juice onto your hair until damp
3)go outside for 1-2 hours. Use sunscreen so your skin wont burn. ~
4) repeat this until hair is prefered color.
Hope this works for you!