Mains voltage LED Downlights to Save Energy

At the supermarket I noticed 3 Watt LED replacements for GU10 halogen down lights at $AU6.99 each. These were branded "Essential", Woolworths own brand (at the Town Hall Sydney store). Previously I tried the 3 Watt MR16 12 Volt Led. The two units appear similar, apart from the different pins in the base. They have a very well made, solid looking cast aluminium body, with one LED. The light from the 12 Volt unit is a soft yellowish colour, unlike the harsh blue tinge light of the Mirabella brand 1 Watt 12 Volt LED Diachronic lightr sold by Coles.