Osram 5W lamp disassembly.04:33

Quite an odd style of lamp. Really attractive design both in terms of appearance and the technical construction, but the use of a single tiny LED emitter in a lamp rated 5W just didn’t inspire me with confidence regarding the potential longevity of the lamp.
I bought it from a retail outlet called BM Homestores who normally stock more generic stuff, so it was odd to see them stocking a fairly high profile brand like Osram. I’m a bit suspicious that they might have been selling off lamps that hadn’t quite met the expectations of the designers in terms of thermal dissipation.
Light output was quite a hotspot as you might guess from a single sharp point source, but didn’t really seem to pack the punch that I expected a 5W lamp to achieve. I was working on a show at the time so I didn’t have access to a power meter to test the actual power consumption.
The construction is actually really pleasing. There’s a front coated-aluminium heatsink body and a separate clip-in electronics housing at the back that took a fair amount of force to get out.
The LED is on an aluminium substrate board with what I think is a Schottky rectifier and a 1K resistor in parallel with the LED, possibly to ensure complete extinguishing quickly when turned off.
The oddly shaped LED PCB has standard white heatsink compound and is a very specific fit into the housing, and is then held in place by a plastic lens that has thrree latching prongs and pillars that mate with and alighn the PCB to press it onto the main heatsink.
The power supply uses a chip called an LNK606GG and it appears to be a standard 5.5W switching supply controller for either mains adaptors or in this case a current regulated supply to the LED. An oddity with the design was a wire that appeared to come directly from the windings of the transformer to the rectifier diode on the LED PCB, with two wires coming back from the LED for the common and smoothing of the rectified voltage.
As I say, a really attractive and nicely engineered lamp, but the tiny single point 5W emitter doesn’t make me feel comfortable. I just prefer my LEDs to be kept as cool as possible.