With the prices of purpose made LED nav fixtures dropping every year I would definitely not go the DR. LED or replacement LED route again.
Purpose built LED's have the proper certifications, color, horizontal & verticle sectors and are water proof and properly heat sinked. Both Aquasignal and Hella are now making reasonably priced LED fixtures.
I have replaced my Aquasignal stern light, that I had tried a Dr. LED bulb in with an Aquasignal Series 32 because the Dr. LED bulb failed and they purposely mislead me about the "certification". I had a Marine Beam anchor light fail in an Aquasignal Series 40 anchor light due to suspected condensation or heat issues.
Currently I am running Aquasignal series 32 bow and stern lights and an Aquasignal Series 40 all round with a Dr. LED Polar Star 40. It will get changed to a purpose built fixture soon enough because I know the DR. LED bulb will not last long in an incandescent housing.
Besides losing coast guard certifications you should not just put a white LED behind a tri-color. For the best performance with LED's you need red behind red, green behind green and white behind white.
I am NOT a big fan of Dr. LED. They have been entirely misleading and they do not stand behind the product. I know, I have dead ones on my bench that they will not do anything about except a "discount" on a replacement bulb. 50k hours my ARSE....
Nav lights are important I would suggest buying from a REPUTABLE manufacturer like Aquasignal or Hella. They have been doing this a LONG time and both waited and thoroughly tested their products before launching into the marine market with LED nav lights. On our yacht club launch we are on our FOURTH Lopo-Light failure. Pretty darn ridiculous and those things are EXPENSIVE...
Bebi builds fairly reliable stuff but last time I checked they do not carry any USCG certifications and have not been tested by Imanna or any of the other certified testing labs for nav lights..
Been around and around with this and I am solidly in the camp of purpose built units from reputable manufacturers.
Please keep in mind that Dr. LED only has certifications in:
Aquasignal Series 40 = All Round
Aquasignal Series 40 = Port Bow Light
Aquasignal Series 40 = Starboard Bow Light
They have NO other certifications. No stern lights, no tri-color, no bi color no and Series 25's or lights other than the three listed..