Just ordered 20 Led bulbs of the net. Dope time I'm sure they do test them but there limited to how long they can leave them on. The main thing with leds is disapating their heat so when you replace them its essential to use a thermal adhesive/paste this sticks the led to the heatsink and transfers the heat. Heat is probably the biggest destroyer of leds. I got 20 LED's for £3.99 and the thermal paste was £1.50. These along with a soldering iron, solder and a screwdriver should keep em going for a while.