Changed mine over 3 years ago to white leds.
I'm 80% certain i fitter these T10 style
And defo these for the T5,s as i had to change one last week.
And i'v just ordered these to change over to, to see if their better.
In total it's a 30 min job to swap, just remember to connect the dimmer switch to test before you screw the clocks back in lol.
Hope this helps.
Martin.