1. Certificate - must meeting AS/NZS standards 60598.2.2
2. Dimmable LED downlights are 20-50% high in prices
3. IP rating - at least IP44 rated for wet area use
4. Insulation contact rating - IC or IC-F rated for safe insulation covering
5. Brightness - 700 - 1000 lumens for residential use
6. Light colour - warm white 3000K recommended for residential use
7. Beam angle - a spotlight with narrow angle or a light with wide beam angle
8. Cut-out size - measure the size of your existing holes if any
9. Quality - good quality driver, good quality LED clips and good heat transfer system
Click here for more details