for replacing halogene bulbs, there's only one solution for me after quite some experimenting: a one (!) 'power-LED' replacement in 'warm (!) white'.
Multi-LED assemblies with their almost 180° lighting
angle drove us nuts, on the boat, as well as at home. There's comparatively little light "everywhere", and that's exactly what one is not
used to with focussing halogene bulbs.
Furthermore, I learnt to look for equipment
with "CREE" power LEDs. Not sure whether that's just a manufacturer, or a technology, but they seem to deliver the brightest output compared to their (true) power consumption
"True" refers to virtually all advertised power consumption
data I found being pure rubbish -- one apparently has to measure oneself.
LEDs are super sensitive to higher DC voltages than they are designed for. Either you install a DC/DC stabilizer, or you go for stabilized bulbs (typically 8-30VDC).
I replaced all 24 Halos on my L380 with these (approx. GBP 5 a piece including shipment to Germany
in my case):
10x G4 3w CREE LED lightbulbs replace 20w Halogen bulb 12v DC 8-30v DC 160 Lumen
I felt I had to inform the dealer about their wrong technical data and related Wattage statements (in vain), but they're almost too bright to read in your bunk, and turn the saloon
and pantry into a really
light flooded area -- @ just 1.3 Watts each (that's approx. 100mA @12.7V, or my multi-meter and battery monitor