Here is the deal... companies like pentair and hayward have alot of money, they take that money and get these lights UL certified... you will find a quarter of these UL certified lights ( suppose to be safe under water ) that get water in them and stop working, if they were IP68 like they were listed under the UL certified, they would not leak.... So, how are they leaking?????? well, the last line in 8 below, it can leak as long as it does no damage... Low voltage 12 volts connected to GFCI when it hits water is suppose to trip and protect you and your family, it also will probably never work again...
On the other side, no one is going to tell you it is ok or safe for YOU to put any light connected to power in your pool that is not UL listed.... You have to do the research and take the chance.... Maybe put it in a bucket of water for a couple of weeks and see if it is trully IP68 and safe....
This is what IP68 is suppose to be...
6 Dust tight, No ingress of dust; complete protection against contact (dust tight)
8 Immersion beyond 1 m
The equipment is suitable for continuous immersion in water under conditions which shall be specified by the manufacturer. However, with certain types of equipment, it can mean that water can enter but only in such a manner that it produces no harmful effects.
Test duration: continuous immersion in water
Depth specified by manufacturer, generally up to 3 m
I am going to do IP68 5m LED RGB lights above the water line with all electrical connections outside the pool incased in silicone, these lights are made to be in ponds under the water and have been used in ponds for years, they just have not been put through the UL certified process....
Have fun and be safe....
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Update, just looked at that light again......
It is CE certified, the company is from canterbury, New Zealand
CE is just like UL for the US, so it is certified....
http://ec.europa.eu/growth/single-market/ce-marking/consumers/index_en.htm
Now exactly what certification it went through it does not say...
Hope this helps some...