PRO Series LEDPARs are very high quality and great value for money. They use High quality main PCB with imported regulator and driver ICs protecting the main PCB and provides continuous & steady electric current for Leds. High quality double-layer LED PCBs with Heavy Duty aluminum extrusion plate furthur protects the Leds and ensures much longer life due to better heat dispasiation PRO Series uses Grade A Pure 10 watts Tianxin LEDs for extra brightness in PRO-LEDPAR 10X18 pure 3 watts PRO-LEDPAR 54X3 & PRO-LEDPAR 36X3 not 1 watts which most other manufacturers do to lower the cost, they brighten the 1watt LEDs so that it looks like 3watts, this greatly reduces the life of Led parcans. Satan uses no compromise heavy duty thick diecast bodies and a very durable paint that ensure these babies can handle rigors of the road. Satan offers 1 year warranty on its ledparcans and most relevant parts are available with their dealers worldwide