LEDs with the t10 wedge base can be hit or miss, I've bought and gone through many.
Excessive heat is usually their downfall as they do not have enough heatsinking, especially the brighter ones. The ones which claim a wide voltage range are better at dealing with battery charging voltages, but they will emit RFI and screw up some OTA tv channels.
Some of the warm white versions are very artifical looking in color, but better than the blue tint of the cool white, but this has gotten better recently.
I've found the LEDs with 5630 or 5730 emitters to be brighter and more efficient, but not immune to death by overheating. I use PWM LED dimmers and go for the brightest LED's I can find, then tame them via PWM and just try to not leave them on at full brightness, especially when battery is charging.
If these bulbs do not work on initial installation flip them over as most LEDs are polarity sensitive. If your specific bulbs do not rotate you will have to swap the wires or flip the receptacle.
Sometimnes the little wires which serve as contacts can make poor connectivity in socket. Bend an arch in the wire so it can press against the receptacles contacts.
I use a difereent name brand than these but the design is the same.
https://www.amazon.com/Ecosin-Fashion-Ca...ds=5730+t10+led
Easily my favorite in color and output, but they are not long life at full output as they get too hot. Once they start flickering I pull out a spare.
