Reflect and Light Screen are field effects that reduce damage from physical and special moves respectively for a limited number of turns. They are commonly used to help a team survive attacks while setting up, using speed control, or safely switching. Their exact damage reduction and duration can vary by generation and item effects. Screens do not stop status moves, critical hits may interact with them differently, and some moves can remove them. A screen setter should usually have enough Speed, bulk, or priority to act before being knocked out. Screens are support tools, not replacements for good defensive typing.