"Good, reliable brand, but be careful where you use dichroic lamps. These are designed for situations where you want the heat to dissipate through the back of the lamp, such as lighting up pictures. However, they are unsuitable for many downlights, which require an aluminium reflector to direct heat down and away from the fitting."
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Review 12 for Osram MR16 Decostar 51S Standard Dichroic Halogen Lamp GU5.3 12V 50W 5 Pack
"The bulbs are halogen and identical to the one being replaced.
4 stars because I would prefer to buy an LED equivalent. But it is too complicated to choose an LED bulb: size, shape, watts, voltage, suitable transformer etc etc. I didn't mind paying a bit extra for LED but I just gave up on the choices!
3 stars because I don't know what the performance and reliability will be like - my crystal ball is on the blink!"