There are a number of legislative provisions that apply in respect of street lighting, starting with the Towns Improvement Clauses Act 1847. A searchable database of current legislation can be found at:
http://www.statutelaw.gov.uk
The Department has not issued any guidance to local authorities on the renewal of street lighting. We have issued guidance in relation to the current bidding round for street lighting PFI. This can be found on the DFT website at:
http://www.dft.gov.uk/pgr/regional/streetlightingpfi