Crown of Blasting (Major): How Much Damage?

[kelvingreen]

PRD wrote:

On command, this elaborate golden crown projects a blast of searing light (5d8 maximized for 40 points of damage) once per day.

So, do you roll the dice, or just apply maximum damage?

And do all the modifications to damage -- undead, light vulnerability, constructs -- apply as normal?

[Ravingdork]

You apply maximum damage (40 against most targets, 30 against constructs and objects, 60 against undead, and 80 against undead with sunlight vulnerability.).

[kelvingreen]

Thank you!