I saw on reptiles direct website an adaptor so Gu10 halogens can be used in normal ES fittings. I happen to have scored a couple of boxes of 50w Gu10 globes and wondered if would be worth while getting some. Anyone used either the adaptors or the Gu10 globes? Pros or cons? Is 50w suitable? How do they go on an on/off thermostat?