5.6  Planned Maintenance, Lighting Performance Maintenance

The Service Provider shall operate a lighting performance maintenance regime in accordance with the relevant PS2 Method Statements. In order that the lighting performance may be certified the Service Provider shall ensure that:

(a)  the photometric efficiency of each Luminaire is maintained within the parameters used for maintenance factor (MF) in the design process and Relevant Standards, taking account of environmental degradation of Luminaire bowls, reflectors and refractors, and lumen depreciation of Lamps;

(b)  Apparatus replaced as part of an Investment Programme or Accrued is subject to a lighting performance maintenance regime that ensures compliance with the Specific Lighting Design Standards;

(c)  all Lighting Points are In Light during the Lighting Up Periods;

(d)  a tree maintenance regime is implemented to deal with trees and other vegetation impairing the lighting performance, access to the Apparatus and the optical performance or visibility or which is otherwise detrimental to the Apparatus, provided that:

(i)  in the case of highway trees or vegetation, the Service Provider shall take any or all the necessary action, whether it major or minor.  However, the Authority shall be consulted prior to any major tree works being carried out.  For the avoidance of doubt, the Service Provider shall consult the Authority in relation to any branches which are over 25mm in diameter;

(ii)  in the case of non-highway trees or vegetation, the Service Provider shall notify the Authority of the need for action, following which the Authority shall take appropriate action under the Highways Act 1980.  Following the serving of any appropriate notice by the Authority, all subsequent action shall be the responsibility of the Service Provider;

(iii)  trees under preservation orders are detailed in Appendix F (Tree Preservation Orders) of this Output Specification.