In reply to UKC/UKH Gear:
> I'm not sure how, technically, its IPX5 rating differs from the HT500's IP65, but either way this thing is easily water resistant enough for use in heavy rain.
The first number tells you how good it is at resisting ingress of solids and dust, the second is water protection.
So the IP65 rating of the HT500 tells you that it shouldn't be harmed by dust or being gently sprayed with water. The IPX5 rating of the HT1000 tells you that it should have the same resistance to water but hasn't been given any certification about dust.
Higher numbers generally indicate protection against more severe conditions. There's only one higher level of dust protection but quite a few more options for waterproofing.
It's kinda weird that they wouldn't just get the same certification for both of them. Makes you wonder whether the HT1000 was expected to fail the dust test for some reason. Though on their website spec sheets they describe both ratings as "water resistance" so perhaps they only tested the water resistance and whoever wrote the copy misunderstood the system.
Oh yeah, elsewhere on their website there's a comparison table for a variety of their torches which shows all of them, including the HT500, with an X for dust protection. So the difference is probably just an error on the spec sheet and they haven't bothered certifying any of them for dust ingress. Which seems logical.