None of the actual compact bulbs are recommended. MVB's, like the solar glo, are fine but not actually compacts

The megaray or the t-rex active uv heat are the only ones recommended for dragons.
It's also possible that your fixture isn't designed for the wattage you're using. Is the fitting (the part the bulb screws into) plastic or ceramic? It should have a sticker somewhere on it that says what wattage it's designed for.