The LED lamps are a good replacement for 10 watt bulbs and can replace in brightness. It is important to note two things: - The LED bulbs are much larger than the conventional bulbs and is therefore not always suitable - You should first check the performance of transformer whether the LED bulbs are also attached to the transformer and this is not "under demand". This could cause malfunctions. Otherwise, just a good substitute. Because of the "oversize" only 4 stars.