The silicone will make some fumes for the first 24 hours. So it's best to leave him somewhere outside the habitat if you use it inside. If you do try using it on the hide just take the hide out for a bit.
It sounds like the other suggestion was to just let it dangle from the top so you can always try that too.
I just have used silicone for some belly heated tubs and such in the past and not for something like the bulb before. So yeah my recommendation may be a bit off.