Effective, this is a very big step forwards for undead PC's:)
Though these are still high LA Templates and are not a good idea for inexperienced DM's or players to use.
Personally I think lich and Vampire PC's are very hard to effectively meld with almost any player combination less than 8 player. The two templates were originally NPC only, plus they have such high LA's and lack of HD that any hope of using a slower progression (such as a monster class) is next...
the Libris Mortis states the effects of spells on sunlight sensitive undead in chapter 2.
I've loaned my copy out but if I remember correctly the daylight spell counts ad daylight as does the sunburst but not the sunbeam (I may be wrong).