Every day (around 12:00pm), the tomato trays were placed outside for sun light treatment. As there are few publications on the effect of sun light treatment on tomato carotenoid content, the tomatoes were exposed to sun light for a total time of 60 min. Tomatoes were exposed to sun light for 30 min, turned over and exposed again for a further 30 min. Using half hour direct exposure sun light data (for Tullamarine Airport, Victoria, Australia) sourced from the Australia Bureau of Meteorology, daily sun light treatment energy was, on average, 1.66 ฑ 1.52 MJ/m2. The temperature during the sun light treatment was recorded and was between 26 and 31 _C.