"As an electrician, it drives me nuts that local shops only stock "Dichroic" 12v lamps which are designed to dissipate heat backwards as well as forwards, making them unsuitable for many recessed fittings. These "Aluminium" types are designed to radiate their heat forwards which stops the fitting and the wiring getting hot. Well done screwfix for stocking them."
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Review 3 for Halolite MR16 Halogen Lamp 20W Pack of 5