“…First, LEDs do not have toxic substances, like mercury, representing an eco-friendlier option to traditional UVC emitting sources in terms of safety and waste management [1,2,[5][6][7]10,19,22,26,28,32,[47][48][49][53][54][55]62,63,68]. Second, in terms of operation, LEDs have longer service life[2,5,10,11,26,28,48,49,52,53,63,65,68] (approximately 100,000 h[11,52]) and they are easier controlled than conventional UVC sources [1,17,22,47,52,54,63,68], they do not need warm-up periods [1,2,6,7,28,47,49,53,56,65,68], nor they degrade over cycles[2,22,28,49,68]. Third, in terms of efficiency, LEDs emit low heat levels [1,6,7,19,28,62,63] and they have low energy consumption[2,…”