Apparatus and method for illuminating blood

A handheld light-emitting device comprising:

• a first light source;
• a first reflector that directs light from the first light source outward from the light-emitting device;
• a second light source;
• and
• a second reflector that directs light from the second light source outward from the light-emitting device;
• wherein the first reflector and the second reflector are separate from each other;
• wherein the light-emitting device forms, outside the device a green light zone, a red light zone, and a combined light zone that is a combination of green light and red light;
• and
• wherein the handheld light-emitting device is for illuminating blood such that a contrast between the blood illuminated with either the green or red light zones and the blood illuminated with the combined light zone causes the blood to be perceived as standing out compared to the background.

A method comprising:

• illuminating blood with a light-emitting device which comprises;
• a green light source configured to emit green light;
• and
• a red light source configured to emit red light,
• wherein the emitted red light and the emitted green light remain separated inside the apparatus, the green and red light sources being configured to create a light pattern having at least three light zones, wherein the green light defines a first light zone, the red light defines a second light zone, and at least a portion of the green light and at least a portion of the red light combine to form a combined light zone outside of the light-emitting device that defines a third light zone, wherein a contrast between a red color illuminated with either the first or second light zones and the red color illuminated with the combined light zone causes the red color to be perceived as standing out compared to non-red colors;
• and
• wherein the light-emitting device comprises a first reflector that directs the emitted green light outward from the light-emitting device to form at least the first light zone and a second reflector that directs the emitted red light outward from the light-emitting device to form at least the second light zone, wherein the first reflector and the second reflector are separate from each other.