LED highbay, LED troffer, LED wall packs, LED canopies, LED area light, LED flood light, LED street light, LED vapor proof,fixture, LED tubes. LED downlights, LED wall washers.
Time and place: 1999, California
Early products: LED lighting products
Rancho Cucamonga, California
Mexico, Caribbean Area, Chile and Sout America, Australia, Dominican Republic, Kenya, Isreal, The Netherlands, Frances, Ireland, Scotland, UK, Germany, Latvia
If you brand new lamps succumb to the LED death rows, it could be short surges in electrical. About lightning strikes, but sometimes fluorescent lamps in the same electrical circuit are to blame.
Potienzielle risk for LED lamps and luminaires: lightning strikes can cause surges in the power supply.
Recently it has caught the Brandenburg municipality of Wandlitz : after a lightning strike, several were equal the 640 euro expensive LED street lights suddenly pitch black. They did not have a surge protector. The estimated cost of approximately 40 to 80 Euro appeared apparently initially too high in relation to the risk of the commune.Newly purchased lights should to be equipped in the future however – after all.
Actually, especially the LED outdoor lights exposed to wind and weather likes are victims of “transient surges” in the power supply. With well over 10,000 volts can be achieved partly only for fractions of a second; that but enough to send LED modules or components of ballast beyond repair in the hereafter. Therefore, the provider of protection circuits advertise mainly in commercial and public customers for their devices.
Short-term (“transient”) spans in an AC mains supply. The sine oscillations in the 50-Hertz clock on the t-axis (time) with regular fluctuations were normal up and down (U-axis for Volt). The mini rashes look like dashes or points and also in the local area network can reach tens of thousands of volts
Our LED lamps and lighting fixtures are at home potential victims of this phenomenon. Although decent products should hold off briefly also (photo right)twice the usual household AC voltage of 230 Volt, without lasting damage. They don’t have a real protection against extreme surges but normally.
An industry insider estimates the additional cost of something around 30 euros per device on my request – would enormously increase “consumer” products and be sure not to give their customers. Smaller solutions are cheaper, offer only limited protection, and are rarely used.
Free replacement is cheaper for manufacturers
In principle, it seems manufacturers cheaper to replace failed lamp on warranty or goodwill – without extensive follow-up free long before the end of the rated life. Such a surge (which is usually not covered by the Lamps guarantees) is relatively rare in the budget and the real cause of the failure is almost never to prove in individual cases.LED chips and drivers can finally die in all possible influences: design flaws, production defects, heat, moisture, chemicals, wrong transformers etc.. Transient mark hardly obvious, individual, clearly assignable damage according to information from various experts.
Mostly circumstantial as clues to remain true for the provider. If a customer such as always back rows new 230-Volt lamps (or special transformer for low-voltage lamps) in a particular circuit die the premature death of LED, but surprisingly enjoy a long, bright life after versuchsweisem installation of surge protection in the joint line, then something was lazy probably with the power supply.
And that must have not even to do with thunderstorms and lightning strikes. Sometimes it is enough, if in the same circuit fluorescent be operated with conventional ballasts (KVG) or electric motors (such as drills). Here, suddenly several 1000 Volts through the line can shoot through shifting and induction, which not coped with a LED light source.Even power outages in the area cause indirect significant overvoltages, if the ‘juice’ is back, and suddenly all possible consumers to simultaneously record their operation in the area.
How exactly such an event affects the network in your home, depending on the type of installation and the protection circuits installed by an electrician. If you are among the relatively few victims of frequent LED death, it is so perhaps not an “planned obsolescence” of alleged “scrap LED lamps”, but outside influences.
Poor cost / benefit ratio?
Unfortunately even serious and conscientious manufacturer can expose surge-proof bulbs for private use only up to certain limits. “Surge test” end normally at 1000 volts peak voltage. Really elaborate, resettable protection circuits would especially in tight retrofit types anyway no place; quite apart from the cost.
The balance seems to be here similar to how he should be also with various Cancer-preventive screenings : the very high effort is obviously no reasonable relation to the benefit. We must accept the one or the other (led) death then hold as collateral damage of the missing prophylaxis. With me it was by the way, no LED light, but the electronic transformer of a “Paul Neuhaus” light, which blew during lightning storms this year.
Still a danger: high inrush current
Similar fatal create LED lamps, lighting fixtures, or drivers even among themselves – because of another stupid phenomenon: as capacitive consumers with switching power supply and often power factor correction filter (PFC), they have a high inrush current. It comes – simply said – therefore, act like a short circuit in the power supply that the capacitors built-in voltage-stabilizing in the unloaded condition. There times in the short term up to 50 amps which can destroy Vorschaltelektroniken, expensive dimmers and relays arise from a “cold start”.
Therefore, some manufacturers write the maximum number of a lamp model within the power circuit on the Pack (in the photo on the right “20 x” when a current 5-W LEDON GU10 LED spot). Inrush current limiters or “soft-start” dimmer or switch prevent that damage; make sure your thing than the LED provider however is also here more. Theoretically, a manufacturer in this case could namely plead on “improper” and reject a warranty or damages.
Some of the Already tested LED lamps I suspect however because of the sometimes rather long turn-on delays that there already have been integrated protection circuits. In my Studio-spot lights circuit with 14 dimmable GU10 LED spotlights from eight manufacturers all at the same time the lights work, but with slightly different “thinking time” from 0.5 to over a second never sign up to the press. This may be somewhat irritating for LED lay, but that I had there also never had electrical problems or defects of the dimmer.
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