Suggest a material to print soft silicone diffusion for a LED light

[Amazeballs]

I have very nice and compact RGB lights Vijim VL-2, but I really want to make some sort of diffusion add-on. 

Kind of like those: https://aliexpress.ru/item/4000327099448.html?spm=a2g0o.cart.0.0.4dae3c00eDBBlw&mp=1&_ga=2.141667378.1643993496.1592316009-563455226.1581321775

But with deeper pocket for white diffusion. Those in the link above dont fit my light anyway. So the idea is to model them myself and 3d-print. I just need to know the right material to do it. Any idea on which one to use? 

[BTM_Pix]

You can print it using Clear PLA filament like this one here :

 

If you want to avoid the design and print aspect and go really DIY then you could modify this tutorial which makes a phone case using hot glue to get a similar effect.