Why would someone want a helmet that is...
Why would someone want a helmet that is designed for light impacts only rather than a severe impact? Is it designed for boarding? I prefer a helmet that will protect from a severe blow, otherwise what is the point of wearing it?
When discussing a "hit" in terms of taking a blow you have two basic types: high impact (read: catastrophic), low impact (read: concussion). All helmets are expected to meet the safety requirements for a high impact hit, this helmet is no exception. Many helmets, like for example, a normal bike helmet, do not protect against low impact hits. So, when you take a decent blow to the head in a helmet that does not meet low impact standards your chances of a concussion are significant.
This helmet is meant to protect against both high, AND low impact hits. It does so with the use of special foam padding. Most popular winter helmets meet these requirements.
Hope this was helpful to you :D