That looks like a nice setup! I came to LEDs a long time after I built my car so reducing the wiring behind the dash wasn't an issue for me. I replaced (almost) all my bulbs with LEDs. In case you're interested in other bulbs, you can find my list of LEDs used on my TCS (which was converted to Red/White/Amber rear lights) here:
http://www.lotuseuropa.org/LotusForum/index.php?topic=1907.msg17917#msg17917I'm sure you know you'll have to get electronic flashers (listed in that post). The only problem with them is that they don't make much of a 'click.' I'd like to find something to put after the flasher and before the lights to make a good audible sound but so far, no luck.
In case you missed it, the turn signal is red.
LEDs are generally long lasting, but they do go out - a guy I met with an Evora told me it's not unusual for some of the LEDs in the tail lights to go out. You would have to live with that or pay a lot for a replacement if that happened to you. On the other hand, it wouldn't surprise me to find that the LEDs you're looking at are of better quality than those used by Lotus. For that reason, I would vote for LED replacements of incandescent bulbs. Doing that would also allow you to get rid of the DB-10.
[edit]I just noticed that they list electronic flashers that 'click.' If they actually do make a loud 'click', I'd be interested in one. If you get them, I'd like to hear a report on them.
[edit again]I looked up the flasher they sell and LOOKS like the same one I got from Summit Racing which has a different number. Mine does make a click but I can't hear it except when I'm idling. My car is pretty loud (so because of the poor mechanical signal canceler and the fact that I can't hear that my turn signal is blinking, it's not at all unusual to drive several miles with my blinker on!) but even if it were much quieter, I don't think I'd be able to hear it during normal driving.
[and edit again]Here is a link to the flasher that Classic Auto LEDs sells:
https://www.amazon.com/CEC-Industries-EF32RL-Electronic-Compatible/dp/B00JXLH7CG/ref=sr_1_1?ie=UTF8&qid=1510091703&sr=8-1&keywords=CEC+EF32RL+flasher&dpID=41X9zIgmSXL&preST=_SY300_QL70_&dpSrc=srchHere's a link to the flasher I got from Summit Racing:
https://www.summitracing.com/parts/upd-90652