Class Lamp, this type of design, the lamp is completely, 360 ° light emission. But I think with the wattage and brightness or light output was cheating a little. Indicated are 15W and 1200lm (lumen), but inside on the board (which by the glass even be seen) is 11W plan. Plus probably the consumption of the built Ballast of 4W then gives the 15W. A 11W LED light has never 1200 lm Luminous flux corresponds to a 120W light bulb does not! (LM - Lumen - luminous flux) One 120W light bulb had about 1500 lm. This light bulb in my opinion more than 900-1000 lm what a 75W incandescent correspond. But in spite of all the bulbs for my application Top and highly recommended, you may just do not believe all descriptions should also watch out and compare. (Highly recommended) As mentioned above bulbs Top and not least in the price and free shipping unbeatable super!