Replace 38mm Fluorescent tubes with 26mm tubes

The cost of a T8 fluorescent tubes is typically £0.50 to £2. The energy saving available is approximately 8%. Replacing T12 tubes (38mm / 1.5" diameter) with T8s (26mm / 1" diameter) is a very simple measure that offers exceptionally good energy savings for the minimal capital investment required. T8s are available in the same lengths as T12s (apart from the largest 8ft T12 length), tend to be cheaper than their equivalent T12s, and will usually slot into the same light fittings.