The Lightstrip 55" is intended for 55-60" and has a length of 216.5 cm. So, if you attach the light strip according to the instructions at a distance of 5 to 8 cm from the edge of the cabinet, it will open exactly at the bottom left and right at both ends of the 55". I briefly compared the dimensions and calculated the difference, and I would say that this light strip is too long on the 47". But maybe measuring it yourself will show a different picture. However, you should bear in mind that the light strip should not be attached too close to the edge of the cabinet because the light effect could cause too direct a glare.

Yes, sure, it would just be longer but it should go without problems.