Sorry you have not understood our Goan scenario dear Albert Peres. What you said is true but it is meant for those structures in houses, clubs, restaurants, hotels etc what you say about dimming etc etc is known to us and we have no severe problem because we buy them from the local market. Now about the street LED 's behaviour as you said is different, but my point which I have stressed is that the Govt is procuring through tender quotation etc and the quality comes down. When they intend to install all over Goa these should work of course when the supply is stable and uninterrupted power supply but here in Goa the logic is different, they are in hurry for some purpose that could be elections or vote bank and ultimately they land into a scam. If there are problems of flickering LED's than it can harm Eye sight those staying near these poles and also to motorists who travel across. Thanks for your inputs from Canada.
Stephen Dias Dona Paula Sent from my Samsung device On 9 May 2017 07:30, "AF P" <[email protected]> wrote: re: http://lists.goanet.org/pipermail/goanet-goanet.org/2017-May/172604.html LED STREET LIGHTS SUPPLY INSTALLATION IN GOA APPEARS TO BE NOT FULL PROOF. Backgrounder: Here you go http://www.ledsmagazine.com/articles/print/volume-11/ issue-4/features/developer-forum/proper-driver-design- eliminates-led-light-strobe-flicker.html Most LED lights designed for Western countries where power supply is consistent will not dim with power fluctuations. They will simply go out or as you experienced flicker. LED bulbs are not analogue like regular filament light bulbs. Each LED is controlled by a circuit board. Many houses here have a dimmer switch that dims lights in say over the dinner table. This light fixture requires LEDs with a special internal controller (more expensive) to work as the dimmer switch fluctuates (lowers) the power. I bet the Municipality did not take into account roving power fluctuations when they purchased LED bulbs. BTW in Canada we have other LED issues. Standard bulbs generate heat and this prevented ice build up on public lighting fixtures and traffic lights. Now, after an ice storm you will see crews chipping ice off bulbs in the winter. A water repelent coating and new fixture design reduces ice and snow drifts within the traffic lights system. --- Albert Peres 416.660.0847
