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Optronics Trailer Lights BK70BB Review

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Review of Optronics Accessories and Parts BK70BB

Today we're reviewing part number BK70BB from Optronics. This is a trailer light mounting bracket for six and a half inch oval trailer lights. It's constructed or durable steel and it has a black powder coat finish that resists both rust and corrosion. The bracket can be mounted horizontally, like this, or vertically, like that. It has two mounting holes at the top and two screw holes, one on each side, as you can see here. The opening for the six and a half inch light is six and eleven-sixteenth inches long, and it is two and five-eights inches tall from the bottom of the opening to the top. The way this works is, you must have a six and a half inch grommet. If you don't have one of your own, you can purchase this one separately on This is part number A70GB, and it is the Optronics six and a half inch rubber grommet.

The way this works, I have a six and a half inch oval light here, so I can show you. You put the grommet on the light, it gives you a nice weather-resistant seal, and as you can see, the grommet is open in the back for easy access to your wiring. Then you mount that into the bracket, like that. It allows you to flush mount your light. We can take that off. There are brackets made by several other manufacturers for which this part can be an exact replacement, and those are listed on the product page. Now to check some measurements. This bracket measures eight and a quarter inches long. Four inches tall. And one and five-eighths of an inch deep. There you have it for part number BK70BB from Optronics, the trailer light mounting bracket for six and a half inch oval trailer lights.

Eric M.


HiI was wondering what are the best cargo carrier lights for the curt aluminum with ramp 50 X 30 12ThanksEric

Etrailer Expert

Jacob H.


To get your aluminum cargo carrier equipped with lights I would recommend using # 337LB383ALSM for your light housing. This box is going to provide the most protection and because it's aluminum, you won't have to worry about corrosion or rust. You can then use # STL72RB and # a70gb to get your lights in place. And connect them with # 002220 .

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