I was browsing a lighting website, And I found this:
https://www.1000bulbs.com/product/2616/STAG-FFNGE.htmlI was looking at the specifications, And it produced 400,000 Lumens for just 1000 watts.
This indicates 400 LPW! If it had an accidental zero, then it would be 40 LPW, Still above the normal efficiency. Mistake or real?