So you have no data, no facts, and no experience with HF welding helmets? I certainly respect your opinion, but I wish you'd have pointed that out earlier - I assumed you had direct experience with HF welding helmets. Please don't misunderstand my typing here - I know you have more expertise than me in this area, I'm just trying to understand what sort of danger I'm putting myself in at this point. I mean you absolutely no disrespect.
I have trouble understanding how I can be getting flashed by a helmet with 1/25000 response time because it's a HF but Miller XLi's get 1/16000 response time and they don't flash the user? Or are Miller XLi owners constantly getting flashed by their helmets? Or is HF outright lying about their response time?
Judging strictly by the numbers, the HF helmet is safer than the Miller XLi at roughly 1/3 the cost. Now I assume that the XLi has features on it that make it a superior helmet in some way (at least I hope so for 3 times the cost), but I don't think it is any safer in terms of flash danger than the $60 HF el-cheapo (unless HF is simply lying).
Believe me - I know most of what HF sells is bad stuff. Ordinarily the only things I will buy from them are consumables like latex gloves and paintbrushes. But in this case I cannot find one single documented case of anyone being harmed in any way by using a HF welding helmet. The closest I can find are vague references to "itchy" or "irritated" eyes after using the helmet 1 time (after which the subject immediately tosses the helmet and buys a name-brand only to discover a lack of discomfort - nevermind the fact that the irritated eyes could have been caused by something other than the helmet).
-Ryan