What is a maintenance factor?

As well as lumen depreciation, dust/dirt accumulation on light fittings and room surfaces will affect light levels in the intervals between cleaning. To account for these (and other variables) a "maintenance factor" is used in lighting designs. This is a number ranging from 0-1 (typically 0.8 is used for LED products by default)and it is multiplied by the results of the design calculations with the aim of simulating lux levels at a particular point in product lifetime/cleaning cycles. This is almost always taken to be the mid-point unless stated otherwise. It is important to consider that if you are comparing designs with the same maintenance factor and one product has a much longer lifetime than the other, the light levels from the longer lifespan product will remain higher than the simulated maintenance factor for longer.

Latest
Blog Posts

Our lights are used by

BookerBrewdogSantanderDupontGlenfiddichSparLogoplasteLogainairNHSLothian BusesWabtecWalkers
Customer Reviews Bg
  • I am delighted to have used Kellwood...

    - P. Nisbet, Wabtec Corporation

  • a project that was well planned and promptly accomplished

    - E. McHugh, Loganair

  • Where others let us down, Kellwood did not

    W. Coley, Barking Abbey School

  • ...my client is over the moon with the end results

    A. Fraser, MacLean Electrical

  • I'd certainly recommend them

    V. Richardson, Stolle Europe

  • I'm more than pleased with the guys. I'd recommend them to anyone

    G. Gray, Logoplaste

RecolightScottish Engineering