I was at a Film Society meeting today and out guest speaker was talking about some of the lighting equipment we have on campus. One of the items he emphasized was an HMI light. It is a light used in filming that consumes a comparatively lower amount of energy and emits less heat than many comparable lights, making them very useful on sets with limited power. It made me think of Blum’s lecture and his focus on the light bulb and its improvements over time as this is a light that has been improved and tweaked to suit a very specific purpose.