Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
If this card battles a LIGHT monster, this card gains 1000 ATK during the Damage Step only.
--月の女戦士
--Penumbral Soldier Lady
local s,id=GetID()
function s.initial_effect(c)
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_SINGLE)
	e1:SetProperty(EFFECT_FLAG_SINGLE_RANGE)
	e1:SetRange(LOCATION_MZONE)
	e1:SetCode(EFFECT_UPDATE_ATTACK)
	e1:SetCondition(s.condtion)
	e1:SetValue(1000)
	c:RegisterEffect(e1)
end
function s.condtion(e)
	local c=e:GetHandler()
	local ph=Duel.GetCurrentPhase()
	local bc=c:GetBattleTarget()
	return (ph==PHASE_DAMAGE or ph==PHASE_DAMAGE_CAL)
		and c:IsRelateToBattle() and bc and bc:IsFaceup() and bc:IsAttribute(ATTRIBUTE_LIGHT)
end