I know other people stat changes don't matter when your using it, but what about light screen and reflect?
Yes, Refect will work against Sacred Sword.
"Sacred Sword inflicts damage, ignoring the target's Defense and Evasion boosts. However, Sacred Sword does not bypass Reflect." - Bulbapedia
http://bulbapedia.bulbagarden.net/wiki/Sacred_Sword_(move)
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