Why is resident evil so bright compared to the others

[highwaystar101]

Resident evil 1                                                                   Resident evil 2

                                     

Resident evil 3                                                                   Resident evil 4

Resident evil 5

See Resident evil 5 a lot brighter than the other resident evil games, it's set during the day for a start. I wonder why this is, resident evil is a very dark game by nature.