D.B.R.T student made different types of led lamps in Fab lab.
1. Small Torch.
This torch is working on 9 volt DC battery. You can hang this torch on siling.
2. Big Torch
This torch is working on 6 volt DC battery. This torch is very useful to farmer. They can bring this torch in farm at night. Big light works up to 40 hours and small is up to 80 hours.
3. Emergency Lamp.
This lamp is useful for home. It is working 6 volt DC battery. It works up to 35 hours.