Large volume and weight above 1Kg.

Low conversion efficiency during normal operation. Up to 80%. When the temperature rises to about 55 ℃, the overall heating is high, and the longer the working time is, the lower the conversion efficiency is.

Under normal operation, the conversion efficiency is high, up to 96%, so the temperature rise is very small, which can be controlled within 25 ℃, and the overall heating is low.

The efficiency is generally between 88% - 91, the temperature rise is about 45 ℃, and the overall heating is high.

- Linear chip can only drive about 10W lamps generally, so 20 chips will be stacked on a set of 200W lamps; Based on 80% conversion efficiency, at least 40W energy will be heat loss, and the power of lamps will increase with the increase of voltage, which will seriously affect the service life of lamps.

One chip can drive 200W lamps, and can work normally within the 150V-300V voltage range. The maximum warranty is 10 years, and the annual failure rate is less than 5%; The chip is guaranteed for 15 years and the conversion efficiency will not change.

The structure is complex, and there are many components. The maximum warranty is 5 years, and the annual failure rate is 5%. The conversion efficiency of the power supply will decrease over time.

It is not allowed to use built-in programs for dimming, and only external dimming devices can be connected. However, after the voltage is reduced, the lamp beads will also be partially extinguished with the voltage reduction.

The built-in program can realize the timing dimming function, or the external dimming device can realize the remote electrodeless dimming, and the lamp beads can remain fully lit.

The price accounts for one third of the whole lamp cost, and the higher the conversion efficiency, the more expensive the price.