Q1: What is the Warranty for the lamps? A1;For the lamps, we have more than 1 year warranty. If any quality problems on our side occured in this period, we will take on the shipping cost and replacement. Q2:What is colour temperature? A2:Our LED Lighting offer lamps in warm, pure, and pure and cool white with temperatures measured in Kelvin(K). Te lower the colour temperature is the light given by the LED. Warm white = 2700k-3200k Pure white = 4000k-5500k Cool white = 6000k-7200k Q3: what is CRI? A3:CRI is a figure which feedback the real objects colors. Higher CRI with higher cost for LED Tudes , the CRI is mostly 70-75Ra, and 80Ra with hagher cost. But three are some suppliers write a high data to attract client, please note. Q4: Can I change different lamp holder when I order? And how about the price? A4:Yes. You can. And the lamp holder E14/E27/B22 is same for you. Q5;Can we customize our brand and get support if we have our own market position? A5:Yes.We welcome our customize, and please inform us your detailed mind on your market demand, we will discuss and propose helpful suggestion for you, t find the best solution for you.