No – not all the time. If your eoSim is placed in a well-lit room, you don’t need the LED light strip. Natural light will give the best image, but the LED lights allow it to be used in poor light conditions.
The LED light strip also gives a uniform light across the whole of the operative field, and ensures optimal tracking of the instruments.
At the start of each practice session we recommend that you make sure the light is optimised for tracking, by clicking the 'calibration' option, checking that both instruments are detected in all the circles on the screen (move the coloured bands of both instruments into each circle together at the same time, and hold them there until the circle turns green).