In many of previous posts I have discussed the use of 1 watt white LEDs for making high efficiency LED lamps for implementing in homes for high bright, low consumption illumination.
Here we learn yet another interesting high watt LED lamp project which was constructed by Mr. Debabrata, using 12nos of high bright 1 watt LEDs fitted over a steel plate.
An ordinary $2 12V/1amp SMPS power supply was used for driving it. Remember I have already discussed the construction of this SMPS circuit in one my previous posts?
However in the proposed 10 watt LED circuit there are a few serious technical flaws which needs to be rectified for ensuring long life to the lamp and for obtaining optimal results from the unit.
The first issue could be with the use of steel material as the heasink. As we all know that steel is not an efficient conductor of heat, therefore it's definitely not recommended as a heatsink especially for LEDs which are highly sensitive and vulnerable to heat and current.
The rise in temperature within these LEDs could result in forcing the devices to suck more current which could eventually get transformed into a run away situation and permanent damage to the LEDs or weakening of their illumination.
The following response from Mr. Debabrata simply highlights the above issue.