Method of distinguish quality of LED flood lights with introduction

How to judge the quality of LED lights with quality:
1, see the solder joints. LED lights with LED lights with regular production is manufactured using SMT chip technology, with solder paste and reflow process of production. Therefore, LED lights to bring the amount of solder joints is smooth and no more, to spot an arcuate LED electrode extends from the pad at FPC. The amount of solder joints Knock buy led high bay lamps with uneven, mostly a dot wrap the fillet, while there will be varying degrees of icicles appear, this is typical of manual welding.
2, look at the quality of FPC. FPC sub-two copper and copper rolling, Bonded Copper foil is projecting, and then look at the connection from the FPC pad see it. And rolled copper are closely connected and FPC as a whole, can be bent and will not appear pads off phenomenon. Bonded Copper occurs if bent too much off the pad when the temperature is too high will cause the maintenance pad off.
3, see the LED light strip surface cleanliness. If the use of SMT technology, the LED lights, surface cleanliness is very good, do not see any impurities and stains. However, if the production of hand-welding process Knock LED lights, no matter how clean the surface, there will be residual traces of dirt and cleaning, while there remains in flux and dross FPC surface.
4, see the packaging. Regular led high bay light for sale will use anti-static roll tray packaging, usually 5 m or 10 m roll roll, then outside again with anti-static moisture-proof bag sealed. The cottage version of the LED lights because of the cost, while the use of recycled roll tray, then there is no proof anti-static bag, look carefully roll tray can see the appearance of a clear label when traces and scratches.