With no natural light streaming into the office, your lighting will have to pick up the slack. One of the keys to successful windowless office lighting is to fill the space with a uniform spread of light. The feeling of natural sunlight is easily achieved by using tunable smart bulbs, which can be set to different tones of white light throughout the working day. To get going in the morning, a cooler blue light will help you feel energised and stay focused on the task in hand. In the late afternoon and evening, a warmer shade will help you relax as you finish your day.