 Q: What causes the Glo-Mega to glow?
A: The glow (commonly referred to as Glow-in-the-Dark) is caused by photoluminescence. The materials are not at all like glow-in-the-dark materials of years ago. They charge rapidly and glow much brighter and longer than previous items that you might have had as a child.
Q: How brightly does the Glo-Mega glow?
A: In intermediate levels of lighting, the Glo-Mega becomes a greenish color as the glow competes with the light from its surroundings. In dark conditions, the Glo-Mega's glow has been measured at 1220 mcd/m2 immediately after charging and was still 45 times as bright as required by ASTM 2073 for emergency signage after ten minutes.
Q: How long does it take to charge the Glo-Mega Hard Hat?
A: Charging for 10 to 20 minutes in bright sunlight is sufficient to produce a strong-lasting glow. Thirty minutes in bright fluorescent light would also be sufficient. Even charging twenty minutes near a 40W light bulb will produce a significant glow.
Q: How long does the glow last?
A: The glow can be seen for several days or even weeks after a suitable charge. The following table shows the brightness measured in a test at various intervals after a charge.
| Time in Dark |
|
Luminance
(mcd/m2) |
| 10 minutes |
|
908 |
| 30 minutes |
|
342 |
| 1 Hour |
|
189 |
| 2 Hours |
|
119 |
| 4 Hours |
|
67 |
| 8 Hours |
|
32 |
| 16 Hours |
|
18 |
| 24 Hours |
|
13 |
|
|
