Painting FOH Bulbs to reduce temp

Firstly I work in a school, and while there might be plenty of smart solutions here, there is so much red tape and talking in circles I just need to solve my current issue.

We have 60 5000k LED bulbs for FOH which were purchased without consulting with us, we need around 120 for all our fixtures. Obviously 5000k is pretty cold for a theater space, and we'd like to get something a lot warmer. We now need to buy the remaining bulbs, but replacing the existing ones (still in their boxes 3 years later) is apparently not possible.

Is there something which we can paint the bulbs we already have with in order to reduce the colour temperature? Is there another solution?