Cannot speak about experience on any Olight products except the Valkeryie. I have three. One is new rechargeable Pro version that is on a in the house SBR.
The other two are older models that have been mounted on high mileage rifles for several years without issue. There are not many options for 12 o’clock mounting in an AR Pic rail and still align iron sights over it.
Yes I know Surefire X300 models. They suck for me on rifles. That is my preferred pistol light however with the DG grip tape switch.
Both Valkeryies vibrated for several years in racks of my work truck and were used nightly on open field searches, desert or building searches.