\label{sec:Market_Survey} There are several different machines which are produced for the purpose of testing LEDs in the industry. These devices include the ones shown in Figure [INSERT FIGURE] below. These devices are primarily used to test the lifetime of LEDs on mass and under a number of different operating conditions. While the technology of most of these machines is beyond the scope of this project, we can examine one machine from Chroma which provides us with some indication of how LEDs are tested in industry\cite{Chroma}.
The 58158-SC LED Lighting In-Line test system helps us examine both the old and the new way of testing LED lights in industry. The first important thing to note is that the lights move under a single sensor. This is optimized for the assembly line, and helps minimize the number of moving parts. The second thing to note is the high speed at which this system checks lights. It can test up to 10 000 lights per day. This demonstrates the importance of efficiency and speed the systems used in industry. Finally, the light testing machine relies on a luxmeter - essentially surrounding the light with sensors and measuring the overall brightness\cite{Chroma}. These different features inform the design team about the needs and expectations of the industry, and influenced the designs considered as a solution to this problem.