Not only do CFL bulbs give off a significantly higher amount of heat than is emitted from LED lights, but they also contain highly toxic metals such as mercury. While a person can touch a CFL bulb that has been lit for sometime without pulling back abruptly or being burned, they do become hot enough to cause discomfort.
Definition of crush for English Language Learners. : 1  to press or squeeze (something) so hard that it breaks or loses its shape. : 2  to break (something) into a powder or very small pieces by pressing, pounding, or grinding it. : 3  to defeat (a person or group that opposes you) by using a lot of force.
Crush and run gravel, also known as crusher run, is a type of gravel that is commonly used in places where motor vehicles are often driven or parked.