1. Is the product electrically safe and conform to EMC standards?
The Regulatory Compliance Mark (RCM) (logo on left) indicates compliance to both electrical safety standards and Electromagnetic Compliance standards required for electrical equipment in Australia.
2. Are IES files available?
3. What diode is being used and does it have IESNA LM-80 documentation?
The brand of diode is worth knowing, as with everything there are premium brands (such as Nichia, CREE, Seoul Semi-Conductor, etc…) which are well established and may indicate a better product or at least quality of light.