How to make my hair more blonde naturally?

So I'm going to Aruba in 3 weeks and I want to come back tan and my hair a lighter color now it's a dirty blonde and I want it lighter does anyone have instructions on what to do with the lemons? Or should I use that sun in stuff? What is better? And how do I use it? Im going to be on the beach for 10 days straight also what Tanning oil is the best to use?