Flash lights are generally very tough.
Considering the abuse they are expected to take, day in and day out, just about any of them from the major brands should suit.
Especially since they will probably only be mounted on the shotgun when at home.
Unless you are planning on regularly practicing on a dark range or attending a training class.
Then it might be prudent to have at least one backup.
The one Platinum suggests looks inviting, especially at the low cost.