Rough estimate on Domestic Electrician job?

Hi, basically I'm looking for an electrician to fit an external security light in the back garden of my house. I've not started phoning around local companies yet as I have no clue on how much this will cost, so don't know if I would be getting ripped off or not. I'm not handy DIY at all, and have no family friend etc that I know who could do it for cheap, plus my friends are as useless as me!

If anyone, electricians ideally, can give me a rough estimate cost for the job I would really appreciate it. The job would include the actual light itself, labour and any other miscellaneous stuff with the job.

Cheers!

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electrician brighton|plumbing haywards heath