Retroreflective materials in appropriate trim widths, lengths and performance are effective for improving visibility under low-light level conditions. The 3M bead technology insure excellent visibility at wide angles, allowing the wearer to be seen as he moves about. The material is available in transfer film or fabric backed form which will replicate the movement of the material to which it is attached. Yes, retroreflective materials can retroreflect in the daylight. Because of the lack of contrast, retroreflective materials are not effective for visibility enhancement of daytime conditions.
Retroreflective materials are most effective under low-light level conditions.
Materials that demonstrate fluorescence are those that can absorb energy in the near-ultraviolet and visible regions of the electromagnetic spectrum from the sun, then reemit the energy as longer wavelength visible light. The light energy from the sun that is converted into light energy that we can see offers daytime visibility enhancement not present with other colours. Fluorescent materials are most effective to daylight conditions. Yes, some retroreflective materials are made to be fluorescent. However, not all retroreflective materials are fluorescent.