The present invention relates to a lighting device controlling method for increasing coloration on fruit trees such as apple and pear trees. The present invention supplements an insufficient total daily amount by controlling a lighting device for coloring fruit trees when the amount of sunlight does not reach a total daily amount after setting the total daily amount of ultraviolet rays which have the effect of promoting the coloration of fruit trees. The present invention has effects of: being applied regardless of the type and sunlight conditions of fruit trees； improving farmhouse profitability with high quality by improving the coloring rate of fruit trees without installing a reflective film or without using methods such as the leaf picking of fruit trees and the turning of fruits； and greatly reducing agricultural labor force. Moreover, the present invention has an effect of reducing problem occurrence, such as trash generation and environmental pollution in rural areas, caused by a reflective film removed in a harvesting period. The present invention includes a setting step (A), a measuring step (B), a determining step (C), an elapsed time checking step (C1), an UV supplementing step (C2), an UV subtracting step (D), a daily cumulative ultraviolet light amount checking step (E), and a power blocking step (F).본 발명은 사과, 배 등 과수의 착색을 증진하기 위한 조명장치 제어방법에 관한 것이다.본 발명은 과수의 착색을 증진하는 효과가 있는 자외선 일일 총량을 설정한 후 태양광선 양이 일일 총량에 미치지 못할 경우 과수 착색용 조명장치를 제어하여 부족한 일일 총량을 보충하는 특징이 있다.본 발명은 과수의 종류, 일조 조건에 무관하게 적용할수 있을 뿐만 아니라, 반사필름을 설치하거나, 과수나무의 잎따기, 과수열매 돌리기 등의 방법을 사용하지 않고도 과수의 착색율을 향상시켜 높은 품질로 농가 수익성을 향상하고, 농업 노동력을 크게 절감하는 효과가 있다.또한, 수확기에 제거되는 반사필름이 농촌의 쓰레기 발생과 환경오염 등의 문제 발생을 감소시키는 효과가 있다.
