I bought some similar to the 200w like a year ago par numbers were really bad I didn't bother putting them over plants. one of these days I'll take the lenses off to see if that gives a somewhat useable amount of lightHope this helps? I always read that Chinese made stuff is crap but I kinda wanna see for myself. It's either this or I build my own I need a lot of lights
Here's the ETL directory for that company.
Here is the company https://szriotinto.m.en.alibaba.com?tracelog=alisupplier_sns_minisite
Product would be LTST850w
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