General

Q about enhancing

So this is how enhancing a weapon works:

Enhancing
50-99 Attack: Star +2 Attack Points
100-149 Attack: Star +3 Attack Points
150-199 Attack: Star +4 Attack Points
200-249 Attack: Star +5 Attack Points
250-299 Attack: Star +6 Attack Points

My question is, what if my weapon was 190 attack pre enhance, and then I used a 5 star on it? Would I get +20 watt (as it, 4 weapon att per star since it's at 190), OR, should I get:
+4, +4, +4, +5, +5 for a total of 22 watt?