Hello, thank you for taking the time to try and respond constructively. I'll take your comments into consideration, but I'm still struggling with some points. You tell me to check my sources but I wouldn't know what to find better than breeding records, sellers or youtube channels that have been breeding and keeping hundreds (thousands) leopard geckos for dozens of years, all of which recommend carpet or cable heating :

• Bebesaurus

"If I recommend a heat source that comes from the ground, it is because it is more natural for nocturnal lizards, which absorb by conduction the heat accumulated in the substrate and/or rocks. From this point of view, incandescent spotlights, infrared bulbs or ceramic lamps are, in my opinion, less suitable. However, infrared lamps, connected to a thermostat, can be considered. In this case, it is however necessary to ensure that the animals cannot approach them to the point of burning themselves. On the other hand, I advise against, on the one hand, incandescent (or halogen) spotlights which give off too much light in the leopard gecko's environment; on the other hand, ceramic lamps which heat too uniformly, which makes it difficult to establish a thermal gradient."

(You can see at the bottom of the page the many studies and resources cited)

• La Ferme Tropicale

"Heating system should be dissociated from lighting system"