DIY gurus: Plaster board, Spring Toggles, Light hanging question

[smr]

Can this be done?

I want to hang this light which weighs 3.8 kg :

On this ceiling (Plasterboard)

With something like this:

Can this be done and done safely?

 

[smr]

Ok thanks for the replies, as it seems this involves needing to get to the back of the plasterboard it seems I'm screwed (forgive the pun)... this is my room so you can understand what I mean better than me trying to explain it...

As you can see the fiberglassed wall stops where the slop starts so I can't access the sloped ceiling from behind...

 

[smr]

You don't need access to the back directly. Although of course the job would be a lot less messy! You.can cut one or two holes to feed in wooden batons. You have to grip them in the hole then screw in from the front.

Or make a hole big enough to use a torch and mirror to see what you can secure to if you don't have a finder.

This isn't something I want to do really, I'm about as good at DIY as I am at Golf.

Would this be a job for 'your local DIY trader?'