What blood test is light sensitive?

The blood test that is light sensitive is the bilirubin test, which measures the levels of bilirubin in the blood. Bilirubin is a byproduct of the breakdown of red blood cells, and exposure to light can cause it to degrade, potentially leading to inaccurate results. To prevent this, samples should be protected from light, typically by wrapping them in aluminum foil or using special light-blocking tubes.