Lightening my hair with the sun?

i want to lighten my hair in the sun.

but i have a couple of questions:

1) how long do i need to be in the sun for?

2) can i just wet my hair- instead of lemon juice or anything else; just water?

3) should i put my hair up or leave it down?



thank you! :]

i really appreciate it!Lightening my hair with the sun?
3- 4 hours each day

doesnt matter if its wet or dry

leave it downLightening my hair with the sun?
keep you hair down.