the brightness is greater than that of a 20 watt halogen bulb, I would compare it to 30-35 watt halogen. The light color is pleasant, if you take warm white. The size is not available in significantly larger than that of an ordinary halogen bulb, do not fit anywhere. The theme of "flicker" is because this bulb unfortunately only with DC (12 volts / DC) works. So if this bulb operates on a conventional toroidal transformer or electronic transformer, the AC supplies 12V / AC, can forget the bulb. Either one buys a new DC transformer or builds a bridge rectifier (cost 3-5) in its current transformer a. It's a pity that you can not buy a 12 Volt / AC this bulb. Addendum after a few months: Unfortunately over 30% of the LED are now down. Free replacement was delivered relatively quickly and easily on demand, but still ugly
