Hi all! So I'm setting up a 4x2x2 foot beardie tank, and I've just got all the electrical components in and on. Anyway, I have a 150w ReptiZoo Moonlight Heat Bulb, as it doesn't create much light. It's been in the tank and on for around an hour, however, the 'warm end' on the tank is only 5 degrees warmer than the cool end. There is also no basking spot. Is this because it is a heat lamp, not a basking lamp? Or does it just take ages to heat up?