Set of 4 x 3200K tungsten LED tubes, for use with Studiolite SLED4 & SLED8 models. These can be hot-swapped with the normal daylight tubes & are for use with the new LED models above only. Unlike regular fluorescent tubes, which are still very fragile due to their glass construction, the LED tubes are housed in a hybrid poly-plastic & aluminium housing, making them far more suitable for use in health & safety risk-aware environments such as in educational & medical facilities.