The Cheltenham Ladies' College has demonstrated its commitment to the environment by installing a new energy efficient set of lights in a historic room.
State-of-the art tungsten LEDs are now being used in the Princess Hall in an effort to save electricity.
The new system provides better illumination using just 1/11th of the amount of power at maximum output.
College technical stage manager Anthony Dunn said: "The old lighting system in the Princess Hall has been in place for about 15 years unchanged.
"As with all technology it was starting to display some idiosyncrasies and it was decided that a refurbishment was required.
"Stage lighting technology has gone through some large changes in the last few years.
"LED technology has come of age and is now starting to replace tungsten."
The life of most of the LEDs is up to about five years of continuous use, compared to approximately 16 days for the average tungsten fitting.
This adds a saving of time and money replacing lamps to the reduced electricity bills.
Furthermore, the LEDs on the stage are quad colour, meaning thousands of different shades can be produced for performances and events in the hall.
The change to energy efficient lighting is part of the college's pledge to cutting its carbon footprint.
Girls and staff run an environmental group, chaired by college network manager Mat McMahon, which looks at ways to increase awareness of the green agenda.
Many of the old boilers in boarding houses have been replaced, with new, energy efficient ones due to be installed in all houses by 2018.
In addition, almost every subject taught now includes an element of environmental learning and one assembly each term is dedicated to green issues.
The girls also sponsored a polar bear and more than 50 new trees have been planted on College grounds since 2008.
Mr McMahon said: "Over the years, College has worked with The Carbon Trust, Sustain and other bodies to help develop an environmental policy and we have an active Environmental group run by the Environmental Prefects and a Strategic Environmental group made up mainly of staff.
"Lighting and heating systems were shown to be key areas where we could reduce energy usage and we plan to tackle both."