Abstract: Indoor landscapes are becoming increasingly popular, often envisioned on grand scales as part of sustainable cities of the future. Underlying this trend is research showing that incorporating nature into our daily lives can improve environmental and human health while increasing productivity and well-being. Research on the effects of nature indoors is abundant, but studies of the lighting needed to best support plants in (non-horticultural) indoor environments and the impact of plant lighting on humans is not. The intensities, durations, and spectra of most horticultural lights are not suitable for humans; common indoor lighting can be insufficient for plant needs. However, recent advances in LED technology now make it possible to manipulate the spectral qualities and irradiances of lighting in unprecedented ways. This thesis explores the conflicts and synergies inherent in the light needs of plants and humans to make recommendations for lighting shared indoor spaces. Informed and carefully designed LED systems have the potential to expand the ability to grow food in non-agricultural environments, better provide the therapeutic presence of indoor greenery, and also maintain healthy light for humans. This kind of system would be of benefit in a variety of indoor settings including schools, offices, healthcare and eldercare facilities.