B.Ajithkumar, V.Bharathi, K.Kalaiselvam, S.Lalithaambika, and G.Pradeepkumar. 2018. “Design and Development of Visible Light Spotlighting System for Location Identification”. International Journal of Intellectual Advancements and Research in Engineering Computations 6 (1):56-61. https://ijiarec.com/ijiarec/article/view/403.