12Vmonster DC 12V 6 Watt Warm White 2700k LED Edison Filament A60 A19 Light Bulb E26 E27 Medium Base Lamp DC 12V 24V 36V Camping RV Cabin DC Battery Bank System Lighting Tesla Powerwall Motor Home PV

INITIAL IMPRESSION: This is the best thing to happen to lighting technology since Edison and Tesla! These bulbs have all the advantages of old-world charm with none of the disadvantages of tungsten filament lighting. They are beautiful, functional and above all, EFFICIENT! We especially appreciate the 2700 K color temperature, which only adds to their old-world charm.HOWEVER, be warned: only time will tell if this product has or has not fallen victim to the ever-present evil of engineered obsolescence. We will know that is true if they fail to function properly for at least a decade of normal household use.

Ordered 4 lamps one was damaged from shipping. However the Amazon returns is easy and quick through Kole's. The 3 lamps are nice and bright from 12vdc to 25vdc. They are dimmable as I used a 1 amp variable dc power supply to test. A 9v radio battery will light up these bulbs. ( for a quick test) full brightness comes on at 11 vdc and stays consistent up to 25vdc. My power supply is limited to 25 vdc. The current is higher at lower voltage around 900 ma. At 5vdc. And as voltage increases the current lowers way down to 90ma at 25vdc.

Bulbs provide great lighting.

I've just completed measuring several of the 12v LED bulbs at Amazon, and of all of the bulbs (including other COB), these drew exactly the amount of current as they were rated (6w). The light was also more than any of the others I tested (3.5 -- 7w range). This bulb will dim as well. Very nice, but a bit on the expensive side.

I have this installed outside in a streetlight style enclosure for about 9 months. It is powered off my landscape lighting transformer. It has held up in extreme heat and cold, and naturally it is installed in a "damp" location. If if were to break at this point I would not hesitate to order another.

Bulb works well and dims much better than 120V AC bulbs. This is likely due to the fact that these bulbs don't have much in the way of circuityry in them, compared to 120V AC bulbs.

Manufacturer claims these are dimmable but they are not. They replaced bulbs that were dimmable and the old ones dimmed fine. The switch is not the issue. These look like strobes when dimmed, flickering like crazy. At full brightness they are nice, warm light.

I use these in my off grid cabin, they work great, give off plenty of light, and run directly from the battery bank, no need for an inverter.