These are not very bright lights, the run time isn't very impressive and old battery technology is used.
This light is specially designed for use in explosive environments - one is certified and one is not.
I'm not sure that these are useful unless one is working in an explosive environment.
Here is a definition of ATEX
ATEX is the abbreviation for “ATmosphere EXplosible”, otherwise known as working environments that are potentially explosive. Such environs can include chemical factories, various manufacturing centres, oil rigs and refineries. ATEX equipment generally refers to explosion-proof electrical and mechanical equipment that is designed to improve the safety of users and has undergone meticulous testing to ensure it can withstand the rigors of these demanding environments.
ATEX covers equipment that satisfies three criteria:
It must be purposely-designed for use within an explosive atmosphere at normal temperatures and pressures.
The atmosphere may contain gas, vapour, mist or dust as a fuel, but must be based on air as the oxidiser.
The equipment must have an ignition source in and of itself, such as a spark, hot surface, etc. .
The IECEx scheme is controlled by the International Electrotechnical Commission, and covers electrical equipment for use in explosive atmospheres. IECEx uses different codes and approvals systems, but also requires detailed information on the product label. IECEx does not currently apply to non-electrical equipment. Many modern devices will carry both ATEX and IECEx approval.