Zzzap can’t break a reactor door, bursts 3-4x stronger than lightning

Light blasted through the window and Sorensen and Smith both flinched back. The cot was incinerated and the concrete floor burned. The window flared again as Zzzap hurled a blast of energy at the massive door and a deafening hiss of static boomed from the intercom. He threw another burst and it sizzled against the steel.
“Son of a *****,” the gleaming wraith said. “That is a big door.”
“As you yourself pointed out,” Sorensen said, “you are in a reactor core. It’s extremely heat and radiation resistant.”
“Well, I had to try.”
“It was foolish.”
“Hey, do you have any idea how much damage those bolts can do? One of my small blasts is three or four times more raw power than a bolt of lightning.”

Excerpt From Ex-Patriots, pg 335
Peter Clines
https://books.apple.com/us/book/ex-patriots/id585738393