Regarding the brightness a full replacement for a 100 watt light bulb, but not as "warm white" as such, but very close. By design mainly light emission in one direction on what to consider when choosing. Solid construction with heavy cooling fins, but this certainly makes the bulb can not be used for each lamp. At present, unbeatable value for money. (12, -) Whether the service life corresponds to the information to be seen. "Early failures" did not exist.