In commemoration of Nintendo’s 135ᵗʰ anniversary, September 20 to 30 is NIWA Cross-Wiki Week. Click here for event details and the possibility to win a $20/€20 Nintendo eShop gift card. Please remember to follow the manual of style and code of conduct at all times. Check the Bulbagarden home page for up-to-date Pokémon news and discuss it on the forums or in the Bulbagarden Discord server.
If the Pokémon holding this item creates harsh sunlight with the move Sunny Day or the Ability Drought, it lasts eight turns instead of five turns. (Prior to Generation VI, it has no effect on Drought, which creates harsh sunlight with indefinite length in those games.)
In the Generation VII games, if harsh sunlight has its duration extended by the Heat Rock, the turn counter on the user interface for these effects will indicate that it lasts for 8 turns for the player whose Pokémon used the move, while it will display that it lasts for 5 turns for their opponent. After 5 turns of harsh sunlight have passed, the user interface will display that it lasts for 8 turns for both players.