Emergency lamp is very useful for us, if the electric network in our house is black out at nigh. It will give use light for a moment. We can build it by a minimum cost and power source, by assembling some LEDs, we can make it. The simple circuit is shown in figure 1. For high intensity lighting, we can choose the white color LED. This LED has dropping voltage about 2,5 volt, so if we will connect it to 12 volt, we can arrange in series, and for get high intensity we then we arrange it in paralell.

Figure 1. Circuit of LEDs for emergency lamp.

Figure 2. White color LED

Figure 3. LEDs Lamp when unplugged

Figure 4. LEDs Lamp when plugged in to DC 12 volt.

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