These bulbs are 8.5w, which is equal to a 50w halogen and they produce a genuine and tested, 500 Lumen.
4000k Natural white light colour. This sits in between warm and cool white, which is perfect for most modern households.
Dimmable, but can be used in non dimmable applications on a standard on/off switch.
50mm diameter, 80mm length, this is a long length bulb and is longer than the industry standard size of 56mm.
Extremely energy efficient with huge cost savings over halogen bulbs.
High colour rendering index (Ra) 80. 
These bulbs are crammed with technology and utilize a ceramic thermal management system which means that they remain cool and are more than happy to operate in fire rated downlight cans.
 
Fantastic prices for a top quality bulb, other electrical factors typically sell these bulbs for £15+ each.
 
Product Number- AU-DGU1085/40