2, LED insulation problems
Insulation heat dissipation substrate LED’s terms of positive and negative, to the current to remain unresolved fundamental problems mentioned here only of remedial measures, such as the aluminum substrate to deal with insulation (the initial aluminum plate is not insulated, and now almost all do) and we may find incomprehensible. single LED is not insulated, has little effect on the more stars in series when there is a problem.
3, LED anti-pulse
Due to this problem with manufacturers still controversial, do exist in the practical application, the main reaction on the cold pulse, ie the instant of power-on, a small number of LEDs in the cold state electrical instantaneous breakdown or disconnect not electrostatic or high pressure ( boot voltage is within range).
4, LED light-emitting angle
Various manufacturers of LED lens package is not even the same the emitting angle (nominal angle), the effect is not the same, making the selection of poly mask even more difficult, still to not universal.
5, LED potentially blinding risks
LED light solar led points too concentrated to the center point of brightness super, so it is easy to hurt the eyes of the people, some lighting manufacturers to make efforts in this regard, but because of regulatory lag, only man’s moral problem.
6, LED heat problem
In theory, the G24 LED is not very fever, but due to the immaturity of the technology, the LED fever to be a well-known.
7, LED efficiency is low (light emitting rate)
LED electric conversion efficiency is too low (because there is no device to test, not given).
8 LED brightness is insufficient
Brightness is insufficient, so that the LED lighting industry can only play a supporting role, mainly used for decoration.
9, LED light fades and life
More serious from the Mainland or Taiwanese LED light fades and life, without further ado, the big-name manufacturers such as the LUXEON nominal 100,000 hours, I am afraid it is only their own psychological clearly coupled thermal solutions, good or bad, drive The matches are likely to affect the LED light fades and life 100,000 hours to just a selling point!
10, LED drive power
Most of the drive lines are borrowed from the switching power supply from, of course, a very small number of lines are devoted to the LED driver, but the effect is essentially the same, due to the the DC drive LED need to take constant current control, so that the drive line is enormous, can not be equated with electronic transformer, but the efficiency is relatively low, reaching 80% bad (single reach) In addition, the vendor for the pursuit of applicability, declared a drive with ten teeth casually pick (a two teeth ….. all OK), in fact, this is a misunderstanding, constant current, excessive starting voltage will often LED to death in an instant.
11 LED modeling limited
Makes the shape of the LED lamps LED-sided light-emitting characteristics, subject to certain restrictions.
12, the LED unit price too high
1W-3W LED must be an import of about $ 3, made to more than 10 blocks (poor quality, intellectual property rights) around about a six LED lamps solar led sold the hands of consumers, almost 1000 RMB Would you want to buy a color TV or buy lamps.