Illumination items: By the lighting and illumination committee: Carbohydrate production and growth in plants under artificial light

The optimum conditions of light intensity for the growth of a great variety of plants have been determined using continuous artificial light. The intensity requirements of many plants is such that growth in artificial light alone is practicable in northern regions where winter sunlight is low and unreliable. Plants such as Easter lilies can be speeded up in time of blooming to bring them into the market at a certain date. The use of artificial light makes it possible to force blooming of two varieties at the same time so that hybrids may be more easily produced. There is a correlation between the intensity of continuous illumination and the quantity and nature of the carbohydrates produced in photosynthesis. The production of male or female flowers by some dioecious plants is dependent upon light intensity. — Transactions, I. E. S.