lighteu12x 4W 12V MR16 GU5.3 RGB+CCT LED Spotlight Color Changing and CCT WW CW Temperature Adjustable, Original Mi-Light, Bulb with a 8-Zone Remote (12x FUT104+FUT089)

I bought these bulbs to replace halogens controlled by a dimmer switch (that ramps the voltage from 0 to 12V for a "soft start"). I plugged them in, and three of the bulbs turned on (starting from a slow flash, speeding up until they were on constantly), but one of the bulbs briefly flashed and then went dead. A second bulb stopped working very shortly afterwards, while I was putting batteries in the remote control.The two working bulbs appear to work perfectly fine. The pairing process was pretty simple, and the bulbs have a decent peak brightness (pictured) and colour. I'd have been very happy to continue using them, but...I contacted Amazon about replacing the two non-working bulbs, and was asked to try moving them to a different socket. I swapped the working and non-working bulbs around, and the working bulbs continued to work fine, while the non-working bulbs continued to not work. However, maybe 15 seconds later, the first non-working bulb (the one that failed immediately) fell out of its socket, and I smelled burning plastic.Upon inspection, the pins of the bulb had melted out of the bulb's plastic housing and were still in the socket; the bulb itself was very warm right around the pin housing at the top (while its main body was not warm, unlike the working bulbs). This indicates that the failure caused an electrical short inside the bulb near the pins, generating significant heat just from having power applied to the bulb. Note that the design of these bulbs is that you _would_ leave them turned on at the switch, and control their on/off behaviour with the paired remote, so power would always be applied.Had I immediately placed these in their housing (which could be common for most buyers) instead of testing them free-hanging (as I always do with new halogen bulbs for safety), the lack of gravity pulling on the pins would have meant they stayed in the bulb housing, continuing the short. The resulting uncontrolled heating would have inevitably resulted in a fire.I am returning the entire set of bulbs, because I cannot trust even the currently-working ones. This kind of failure, in a bulb specifically designed to go into an enclosed ceiling cavity, indicates that either the design or manufacturing process of these bulbs is seriously flawed. I STRONGLY recommend that anyone who has purchased these bulbs check the pin connector area for abnormal warmth, and I STRONGLY recommend that the manufacturer recall these bulbs as unsafe.

I bought a pack of 8, installed them, and after 3 weeks, 3 out of 8 have stopped working. Since they spent 2 weeks in coronavirus quarantine before I opened them, they are no longer eligible for Amazon return. As they are very expensive, I may well pursue a warranty return - but how?

Work really well. Easy to synch up bulbs into zones. The colours can be fine tuned to more coloured or more white and the brightness can be dimmed. We have 6 spots in our dining room and can now make the whole room a deep colour, flash for party time, or be a bright warm white for working :)

Have purchased ones for our steam room and spa lights really work well in quite harsh environments would recommend

Didn't work for me