Easy to see without lamp but in lower light lamp is highly effective. However, the lamp's neck is too short causing a glare and only illuminates 2/3 of the keyboard. The size and clarity of the letters are good (you get two sets) but the stickers a a bit too small so contrasting yellow on black effect is very compromised. For example, on the left side of the 'M' the eye has to decipher seven vertical lines: the yellow edge of the letter, the tiny black sliver of the sticker, the side edge of the sticker, the remaining visible edge of the grey key, the side of the key, the black void of the key edge and then the gray of the keyboard itself. Avoidance of all this visual confusion could be avoided by a slightly larger sticker so a uniform amount of black is surrounding the letters. On the horizontal number keys the shift function is to the upper right of the number instead of traditional upper left. Why? Shouldn't have to decipher... Especially distracting on the nine and zero. Looks more like this: 9( 0) The '@' to the upper right of the '2,' is not as visual as the "#', '$' etc.. These stickers have identity problems: <, >. ?/ :; "' sizing and placement. The speaker and function keys may be mismatched for your keyboard. Looked everywhere and tried different solutions to a grey, back-lit HP Envy keyboard. The tiny back-lit letters shine thru the yellow letters of these stickers but the original problem with light leakage around each key renders this as useless as the tiny lit letters of the keys to start with. Too bad my new, awesome, slick, does everything I need, 360ยฐ touchscreen, adaptable laptop doesn't have black keys with lit letters a person with normal vision can see. Stickers aren't a great solution and don't look great but... THIS PRODUCT IS GREAT so I hope they improve it.
