I must of had a dozen ebay and ali light transactions. The ebay ones were ok, because I got my money back on all but the one that worked. While ali was a waste of time and money.
I think a lot of people don't know they got ripped off. A watt meter is a good start, but you still can't tell a samsung led from any other. Maybe you get a similar lux reading to expected, but it's quite meaningless. Most quantum meters are so inaccurate in the further red regions they can't help. We just can't tell what we are getting. But I can bet it's not the latest tech, when it's less than factory gate pricing.
Once I got a single unit, when trying a few suppliers, to see if any had the goods. It was alright. So I ordered 10 more, and all were different. So even if you do get a reasonable unit, there is no reason you will get another. It's a lottery, with similar odds of winning.
However, if anyone does think they scored something alright, do share an actual source, not country of origin.
I think a lot of people don't know they got ripped off. A watt meter is a good start, but you still can't tell a samsung led from any other. Maybe you get a similar lux reading to expected, but it's quite meaningless. Most quantum meters are so inaccurate in the further red regions they can't help. We just can't tell what we are getting. But I can bet it's not the latest tech, when it's less than factory gate pricing.
Once I got a single unit, when trying a few suppliers, to see if any had the goods. It was alright. So I ordered 10 more, and all were different. So even if you do get a reasonable unit, there is no reason you will get another. It's a lottery, with similar odds of winning.
However, if anyone does think they scored something alright, do share an actual source, not country of origin.