While multiple factors play a role in the biological impacts of a light source, the spectrum (wavelength) and intensity (brightness level) are the most important components. Increasing the blue content, especially around 480nm, of white light as well as increasing intensity will improve the alerting impacts of light. Daylight, for instance, induces a high level of alertness response given the combination of both its blue content and high intensity. Achieving alertness responses indoors oftentimes requires altering the specific type of light and the indoor light levels to increase blue content or increase intensity. This has potential to alter the health benefits of the light you are exposed to in indoor environments.