Person Accounts is now supported in Lightning Experience

Salesforce Spring 16 Release Notes – Person Accounts is now supported in Lightning Experience. See below excerpt from

https://releasenotes.docs.salesforce.com/en-us/spring16/release-notes/rn_sales_person_accounts_lex.htm

“If you used person accounts in your org before Spring ’16, you couldn’t enable Lightning Experience in production. But the wait is over! You can enable Lightning within 24 hours after the Spring ’16 release.”