The LED bulb replacements arrived, and I put them in this morning. Both incandescent bulbs were working fine in the Perko fixture prior to messing with it. When I installed the LED replacements, the rear wouldn't light. I removed it, put the incandescent bulb back in, and it lit. I grabbed my phone to call Jeff at MarineBeam to see what he recommended. Without hesitation, he said that they'd replace the LED... and it lit up! Since he seems to have some sort of supernatural powers, I asked if he could suggest some lottery numbers for me. :wink: He did say that the festoon points may fit different from what was in there and to check for corrosion. I did that, cleaned the contact, and all seems fine.
Now, regarding the lesser amount of light from directly abeam of the boat. Yep. The 4 LEDs are mounted on a flat surface. I suggested to Jeff that an angled surface of about 45º would eliminate that situation. Once the lens of the Perko fixture is back in place, there is enough diffused light all around; better forward and aft, but still visible all around. The problem is the Perko fixture, with the forward/rearward lights. BUT, this is a direct drop-in replacement. When it gets darker, I will check it again and if it doesn't do the job, I'll replace the whole fixture. My first impression is that these lights will be visible from 2 miles.
Now, a quick test. When I turned on the anchor light before installing the LEDs, a digital battery readout showed a slight drop (.1). With the LEDs, there was no drop in the battery level. No, this is not scientific. But, it is my understanding that there is a 4 amp draw with the factory anchor light fixture... and each of these LEDs draws 18 milliamps. That is a significant difference for those of us who anchor out.
I did not change out the red/green nav lights, since they will only be one when running, and the engine alternator can take care of that draw. Next project will be to replace the cabin lights with LEDs. I'm impressed.
Here are some photos to show different angles (heavy overcast today)...
10 degrees aft, with no lens...
10 degrees aft, with lens...
90 degrees, with no lens (very little light shows because of the Perko fixture)...
90 degrees, with lens (decent light spread)...
at approx 45 degrees forward, you can still see some light from the rearward light...
Jeff from MarineBeam let me know that this is not the intended application for these bulbs, but is interested in our opinions. I think this will work, will definitely help conserve battery juice, should eliminate the PITA of filaments on incandescent bulbs breaking (I have replaced each a couple times). A slight angle on the LED board will eliminate any light drop to the side - hope to see that as a future enhancement.
Best wishes,
Jim B.