you cant. they just glow. end of, lock this.

you set the life as something like 50000 then set the temp as like... i dunno but they glow they r not radioactive

This only works for dust. You set the life to something high and you set the tmp to 4 or higher. (higher equals more glow) :)

Lol CCTV: I'll tell you how this whole radioactive thing started. I had discovered the glowing dust
(not for the first time) and I just called it a "mysterious radioactive element" and then all the noobs
Thought that it actually was radioactive or something lol

thats firw explosion lol

use fancy display bye pressing 7 and then have some plutonium or uranium out.

Put some dust.
Then, console EITHER

set ctype dust fwrk
set temp dust 7000
set life dust 999999

OR

set life dust 999999
set tmp dust 255

What do you mean by "life all 5000"?
I've followed your instructions but I still can't make it glow