White LED batches
Good LED suppliers know that all white lights are not the same.
White light comes in a variety of shades, measured on the Kelvin colour-temperature scale. Cool white light, for example, could be anywhere from 5000K through 5500K or 6000K, all the way to 6500K. All four of these shades would be accurately called ‘cool white’ – but they would all look slightly different beside each other.
Choose a good LED supplier, and you can be sure that when matching an old colour batch, they will take into account not just the colour description but the Kelvin value as well.