Product: HOTSYSTEM 2x White Cree with Projector 12-SMD 3156 3157 3057 3757 4114 4157 LED Parking Light Tail Backup Light Lamp Bulb For Car
Overall sentiment: negative
Customer reviews:
I do have to say I left a bad review because I was so upset about these bulbs not working and blowing fuses. But with that said the seller has made my purchase right. I have ordered many lights from hot system and this is the only item I have had problems with. I only hope this is an isolated problem. 
 very dim and fell apart 
 Bought two sets for GMC sierra DRLs. Both sets fell apart within days of installation. Returned for refund and would not recommend to anyone. 
 Used these to replace the LEDs I was already using for my DRL and turn signals in my 07 Avalanche. The light they gave was brilliant, but after not even five minutes after installation I smelled something burning! The turn signal had melted and stopped lighting, and the DRL wasn't too far behind.. Save your money.... 
 VERY BRIGHT. Use them for reverse lights in my GMC Yukon. Can actually see when I'm backing up!

Update: These thing worked fine for about a week, then both failed. they got so hot they melted.
I'm lucky the didn't damage anything in the bulb housing. THESE ARE COMPLETE JUNK!!!!!!!!!! 
 I have mixed feelings about this product. One one hand they are very bright and they look awesome, also this company has top notch customer service. Unfortunately, on the other hand I have now had 2 sets of these lights in the past 5 months and none of them work properly. Two are completely burnt out, one has a flicker to it, and the other one only a few of the LED lights still work. It's frustrating because the lights really look great but they are very poor quality. But like I said before they do have excellent customer service 
 I wish I could put ZERO stars... I returned once because 1 bulb broke in my headlight housing (and it's still there), when I got the replacements, one flashed and the other one was separating from the base once again.... CHEAPLY MADE, DOESN'T WORK GOOD Do not waste money or time! 
 only one of the four lights worked the other three only half of the light work 
 These bulbs were plug and play, unfortunately they started smoking, and melted almost instantly after power was applied. I wouldn't recommend this product as they are a fire hazard. These were installed in a 2011 Chevrolet Colorado. These were installed in non-blinker applications, so no resistor was needed. 
 They snap off, there is too much weight out in front.  I used them as running lights and within one drive they were separating. I ordered a new set thinking I broke them same story, and then again same story. They are only held together by a few electrical solder joints.