Here is some video from my Stratodart X rocket glider kit modified with lighting.
I’ve since added a strip of lights in the nose cone as well which makes it glow and helps to judge size and decent rate of the model.
The parts to do your own version are:
Small gauge wire to make the jumpers to solder to the strips and connect + and – terminals from all the strips to each other. The strips can be connected from any set of pads since they are in parallel.
Red jst connector to fit the battery.
LED Strip Light SMD 3528 Flexible Tape 300led DC12V indoor outdoor lighting rope 5 meter length
Plan battery size, count your diides, current draw is 1 amp per 150 diodes(what I used), so with a 180mah battery using about 80 % of capacity to be safe would give 8 minutes, plenty long for pad wait, flight plus recovery.
I simply applied light strips to wing and fuse to make it easy to tell the difference between bottom and top and give light on the tail. I then used clear packing tape over the lights to protect them and hold them down.
On my stratodart I needed just a few grams of nose weight to rebalance. I left the 1s battery installed for receiver power and placed the small 3s battery for lights on the cg via a hatch. Battery weighs 19 grams so my starting weight was 11.6 oz without lights, with lights 12.2 oz, with 3s batt for night flight 12.9 oz. The stratodart has the most wing area and is able to carry the weight better.
For night flying, more is not necessarily better, you can blow out your night vision. I found flying just after sundown allowed me to see the lights very well but still see the ground for landing.
Here is my stratodart, flight shot courtesy of Jim Wilkerson.