The search results don't provide specific information about the types of lenses used in blood tracking lights. However, based on the context of blood tracking lights and general knowledge about lighting technology, I can infer that blood tracking lights typically use specialized lenses or filters designed to enhance the visibility of blood against various backgrounds. These lenses might include:

1. **Optical Filters**: Some blood tracking lights use optical filters that reduce background colors while amplifying the appearance of blood. This technology helps hunters distinguish blood trails more easily in different terrains.

2. **Color-Specific Lenses**: Blood tracking lights often feature lenses that emit specific wavelengths of light (such as blue or green) that make blood more visible. Blue light, in particular, is known to make blood stand out against natural backgrounds.

3. **UV Lenses**: Ultraviolet (UV) lenses are used in some blood tracking lights to cause blood to fluoresce, making it highly visible against other materials.

4. **Adjustable Beam Lenses**: Many blood tracking lights allow hunters to adjust the beam from a focused spot to a wider flood, depending on the tracking conditions and terrain.

The specific type of lens used can significantly affect performance:
- **Optical filters** enhance contrast between blood and background materials.
- **Color-specific lenses** optimize visibility for blood tracking in different environments.
- **UV lenses** are particularly effective for detecting dried blood or in low-light conditions.
- **Adjustable beam lenses** provide flexibility for various tracking scenarios.

For detailed information about specific models and their lens technologies, I recommend reviewing product specifications or consulting with manufacturers directly.

blood tracking light

UV BLOOD TRACKING LIGHT