You stated that You measured the Voltage across several of the LEDs, and all measured ~8.4-Volts,
This has to be a mistake, You are probably measuring Noise-Peaks from the Current-Limiter Switching.
You need to measure the Current, with the Noise filtered-out.
Probably the best way to do that is to measure the Input-Current to the whole Light while it's turned-on.
Do You know for a fact that the LEDs are wired in parallel ?,
or did You make an assumption based on the fact that You
measured the same Voltage across several LEDs ?
Have You actually visually followed the traces on the Board and
determined that, in-fact, all of the LEDs are physically connected in parallel ?
How many total LEDs are there in the Light ?
Having the LEDs all in Parallel has a big potential problem.
They won't share Current evenly.
If You could re-wire them so that You have 2-sets of 4 or 5 in Series, it would be much "safer".
.
.
.
This has to be a mistake, You are probably measuring Noise-Peaks from the Current-Limiter Switching.
You need to measure the Current, with the Noise filtered-out.
Probably the best way to do that is to measure the Input-Current to the whole Light while it's turned-on.
Do You know for a fact that the LEDs are wired in parallel ?,
or did You make an assumption based on the fact that You
measured the same Voltage across several LEDs ?
Have You actually visually followed the traces on the Board and
determined that, in-fact, all of the LEDs are physically connected in parallel ?
How many total LEDs are there in the Light ?
Having the LEDs all in Parallel has a big potential problem.
They won't share Current evenly.
If You could re-wire them so that You have 2-sets of 4 or 5 in Series, it would be much "safer".
.
.
.