Hi Jeff
Bought the SOLAS tape off Flea Bay About £3.99 + p&p for 50mm x 1mtr piece.
DescriptionReflexite FD1403 retro reflective tape length 1 meter by 50mm wide. (Just enough for an E370 top box)
This tape conforms to S.O.L.A.S (safety of life at sea) IMO (international maritime organisation) resolution a.658(10) type II. It is also wheel marked and DOT approved.
Its sticky enough to remove your fingerprints whilst trying to apply it
Took the Givi box apart and simply stuck this stuff over the white plasticised sheets (non reflective believe it or not!) which are located behind the red lens covers. once installed glows like a good one.
** I have installed it
behind the original red lenses on the Givi **
Not sure what kind of reflective standards or limits there are for bikes but its a hundred times more reflective than it was and I'd rather been seen than squashed. If they work out to be too reflective, just reverse or reinstall the original white sheets (don't bin em).