[idi banashapan]

then why suggest something that's;

a) not what they asked for
and
b) hardly a practical solution in comparison to other suggestions

if you see a sticker is wearing down, replace it. a lot less trouble than getting the lamp out and searching around a device for where you marked it. and it's not much use if you are talking to the user of the device over the phone and you ask them for the asset tag which they can't tell you because it's invisible! you need to think practical in a domian environment and 20 units constitutes a thoughful approach...