Review on Energy-efficient 75W Equivalent A19 LED Light Bulb for Industrial Electrical Use: Powerful and Long-lasting Lighting Solution by Johnny Nguyen

Just received, 2 of them had no contact on the bottom of the bulb. The photo also shows a nice lightbulb so you can see what I'm talking about. Found contacts at the bottom of the box. Appears to be about half the weight of other equivalent 75W bulbs. Cheap electronics? Can't find a way to contact the manufacturer. You may have to return the entire box. Color (brightness) seems correct