15 ÷ 500 = 3%
I don’t think BLF has ever done a group buy on the D1S lights. So I would imagine that if there were any complaints about it, the people would be complaining directly to International Outdoor Sports Store rather than to this forum. Maybe some people would mention it in a review thread? I don’t know.
For sure the defects rates vary with every model of light regardless of the brand. Like the Haikelite MT09R. Pretty much all of them had problems. Even the BLF Q8 had issues with the switch lights in the first batches. Some light models might be 0.5, some 3, some 20, some 100.
In my opinion, it’s not so much what the percentage of bad units is, it’s how the company responds to the issues. Like the Fireflies ROT66. All the xpl-hi versions had crushed emitters. They took care of the problem quickly. This can be an inconvenience to customers, but at least it was taken care of.
Other companies like Imalent may or may not fix the problem. They seem reluctant to fix anything. Or else they will charge you for a new head, etc…
Right now Lumintop seems really good about fixing their products. It took them awhile to fix some of the GT issues, but we are currently at 7 out of 1500 needing an issue taken care of, most of which is related to missing or damaged shipments which you can’t even say is a defect. If we count all 7, this is 0.5. We hope to get it to 0 soon.
Bottom line, I don’t see how you can really bad mouth Lumintop when there are other companies that are much much worse.