I used the comet kit to upgrade all the lighting in my TZ and it was fantastic (highly recommend).
However, for the backbox, I ended up swapping out the 1SMD LEDs for 2SMD LEDs so it would better match (in brightness and tone) the modern pins in my line up.
Specifically, I went with the 2SMD Bulbs, 100 Packs - Wedge (555) / Cool White (Natural White) / Frosted for my TZ backbox (ST:TNG as well) and it blends in great.