How long do you need to stay outside after you put lemoned juice in your hair for the second time?

After applying lemon juice to your hair, it's best to stay outside for about 30 minutes to an hour to allow the sun to activate the natural lightening properties of the juice. However, avoid prolonged exposure, as lemon juice can make your hair more susceptible to damage from the sun. If you're applying it a second time, ensure that your hair has been rinsed and conditioned properly after the first application before reapplying. Always do a patch test to check for any adverse reactions.