3 Watt Luxeon LED Bulb Review

This 3 Watt "Luxeon" LED bulb has the MR11 pins loosen after a few round of insertion into a lamp holder for testing.

So I decided to dissassemble it to take a look at the reason for failure.

These are the major components: the bulb base made from nylon, the constant current source module, the Luxeon 3 Watt LED, the LED housing which is essentially the heat sink, the white nylon reflector, the lens and the lens retainer ring.

An interesting thing to note is that the Luxeon LED is not screwed to the heat sink, but is pressed against the heat sink via the nylon reflector using the lens retainer ring. This probably save some screws and assembly time.

The cause of the MR11 pin loosening? Well, the adhesive that hold the constant current PCB module does not adhere too well to the nylon base and so has come off as shown.

Some electrical characteristics of the 3 Watt Luxeon LED bulb: take input voltage of 6 to 12 AC/DC. Current at 6V is 500mA. Current at 12V is 250mA.

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Inside 150W Metal Halide Lamp Replaced By Led Bulb

LED lighting has finally became bright enough to replace this 150W metal halide indoor floodlight. I dismantle the metal halide lamp to have a look.  These pictures are the inside components of the metal halide lamp.

The 150W metal halide ballast, the metal halide power factor capacitor, the  metal halide ignitor and the 270K bleeder resister.  Note the metal halide ballast connection diagram. Essentially the ignitor is wire in parallel to the metal halide lamp to give it the 3KV or more kick it needs to startup. The whole ballast assembly weight about 3Kg, really vintage technology as it is electric ballast. 

Although electronic ballast are available,  more efficient LED have replace metal halide lamps especially below 250W.

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