Reverse Mount Ambient Light Sensor Reverse Mount?

Don't worry about the datasheet, you show some creativity.

I can't see any reason why that wouldn't work, but you might have trouble getting it assembled on a pick and place machine.

The sensors are packaged in plastic tape. This is from the data sheet:-



Once the cover tape is removed the sensors are picked up by a vacuum nozzle, and then placed on the board. Pick and place machines can rotate the components about a vertical axis, but not a horizontal axis, so it's not possible to get them turned over.

You will have to fit them by hand, unless you can find a version that is supplied the other way up in the tape.

There are reverse mount LEDs available. Some appear to be exactly the same items as the forward mount versions, and the only difference is how they are supplied in the tape.

Very good point. I'll plan on hand-assembling those.

I think there won't be a problem as long as you make sure the hole is bigger than the light sensor and the contacts can be rested properly on the pads. If you are not sure if the PCBA supplier can unstand your idea clearly,you can show them a sample for reference.