HealSmart 50W Reptile Heat Lamp Ceramic Heat Emitter, No Light Emitting Heat Bulbs, Suitable for Snake/Lizard/Spider, Plant Growth and Incubating Chicken, 2-Pack

I just saw these https://a.co/d/02hrA6ui And they're 75 mm, which should leave a half inch gap between bulb and globe. I just bought those and the size you mentioned to see which works better!