About LED Temperature .

Now all the street lights ( HPS or metal halogen or mercuric lights) were installed like this : Two lamps on one pole which are controled by two phase wire, this design is to save half evergy and make the working life longer through the control of the light on and off in timing. So in order to replace the traditional lamps with the LED , you have a suggestion to make our modules work with the two phase of the wires. And this is all what I understand now from your words, please confirm.2.After I communicated with our engineers ,they all have one same suggestion: we want to suggest control the brightness by controling the electric current ,and the effect will be much better than yours design :1. the working life would be much longger :The relation between the TJ and the working life when the LED brightness And the formual :TJ=RJC×PD+TC=RJC（IF×VF）+TCIF: electric current through the P and N end of the LED chip , VF : the voltageRJC : the Resistance of the radiator .TC : The environment temperatureA: So , we can reduce the TJ and the power consumption through reduceing the current. And normally ,our TJ is 60-70 degree ,the working life time is 46000-54000 hours , and the TC is 20-30 degree , and if we reduce the current by half , and the TJ can be reduced to about 40 degree ,and the the working life of LED can be 129000 hours ,which would be two times more the original . B ,if the temeprature of the street lights is low , the power supply will also have a longer working life .C, even if the power consumption reduced half ,but the brightness will just reduced 45% about not half .Compare with your method using two phase wire , firstly ,it will make it complex for you to control . second you will save the cost of the wire using on the street ,because you just need one phase . Thirdly ,if use your methord ,our lights will looks not good , such as LU6 , three modules on ,and three modules off seems not beautiful .