Hello I hope its okay I make an answer in english here. My suggestion for you lighting will be what ever to keep your plants. It doesnt really matter much for the geckos. I'd say two fluorescent tubes. One in front at 6000 Kelvin and one on 3000-4000 Kelvin in the back. A high number of Kelvin makes the plants grow very well, but they do also stretch for the light. So by having a lower Kelvin tube in the back you make the growth a bit more compact to look natural. T5 tubes gives more lumen (light) than T8, but you do also get more heat from T5.
As of what I've heard UVB is not needed for Gonatodes but I dont know for Sphaerodactylus. I hope you can use and understand my answer.
_________________ Martin Moldrup Thomsen
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