My Co-worker Bas has made me interested in the Tradfri lighting system from Ikea. He has posted already on his Github page.

Now it is my time to do some reverse engineering.
First I stated with the LED154G2, 980 lm, 12 Watt, 82lm/watt, with a E27 fitting. This device has 4 major parts:

  • Dome which spreads the light evenly,
  • LED PCB,
  • Power PCB with wireless module,
  • Casing acting as a heatsink.
  • E27 connector, the big one.


It contains 2 strains of leds. One which contains the 2200 Kelvin (Warm glow) LEDs and the other holds the 4000 Kelvin (Cool white) LEDs. When switching on both, you get 2700 Kelvin (Warm white). I have read of a hack which makes it possible to choose any color in between 2200 and 2700, but did not actually find it yet.
Every LED strand contains 7 sets of leds in series. Each set comprises of 2 LEDs in parallel. The LED PCB is mounted with heat conducting thermal paste to the heatsink.

Ads by Google

Power PCB

This is the complete module which is completely filled with some grey putty. When sticking a screwdriver in it it is quite easy to rip off parts of it. It does not stick and kind of crumbles.

Now the question is, why do I want to hack the LED lights. I want to fit it to an existing light which I already have. I has a 150 Watt halogen light and I want to LEDify it. I want to use the double amount of leds. Do I put 2 powersupply (and communication modules) in the lamp, or do I use the combined LEDs from 2 Ikea lights and mount them on one Power and communication module. The voltage would need to double. Are the electronics capable of doing that . ..

Ads by Google

Some data on powerconsumption:
Model: LED1650R5, 220-240V, 50/60Hz, GU10, 400lm, 5.3W, 40mA, 75lm/W, 2700K, 36°.
Measured with a Voltcraft 3000.
100%: 6.0 W, 7.5 VA, 0.80 Cos φ
50%: 1.6 W, 2.7 VA, 0.62 Cos φ
10%: 0.7 W, 1.7 VA, 0.40 Cos φ
Off: 0.0 W, 0.0 VA, 1.00 Cos φ
In the off position, there is probably some consumption, but the Voltcraft 3000 could not measure that.
Measurements are done by Bas.

Model: LED1537R6, 220-240V, 50/60Hz, GU10, 400lm, 6W, 39mA, 67lm/W, 2200K/2700K/4000K, 36°.

Model: LED1623G12, 220-240V, 50/60Hz, E27, 1000lm, 13W, ??mA, ???m/W, 2700K, ??°.

Model: LED1545G12, 220-240V, 50/60Hz, E27, 980lm, 12W, ??mA, ???m/W, 2200K/2700K/4000K, ??°.


This page and its content is not affiliated with IKEA of Sweden AB.

The purpose of this project is to learn and improve using reverse engineering techniques. Use this information on your own risk.

Leave a Reply