I bought some “Chrome” surface mount LED modules from Oznium.com to see how they’d work as replacements for automotive Festoon light bulbs (the ones with the pointy ends). The modules are about 2.3″ (60 mm) long with an adhesive strip on the back. The “chrome” is plastic.
Oznium actually sells some LED Dome Light replacements that are 5×5 LED arrays that include common bases with the LED array.
I thought that these modules would fit inside the BMW Bavaria trunk light housing that uses a 8.5 x 37.4 mm Festoon bulb.
The photograph showing the trunk is a little misleading – it’s actually about 4 times brighter than the bulb with the filament – you’d have to strain to read by the light.