At first, he was going to put the werelight in the same location as Izzy's to show off his accuracy, but then he decided that the smart bet would be to have them clearly separate. That way there could be less confusion about whose spell caused what.
(Once we are certain the others are done.)
"Ready?" he asked Izzy. "Three...two...one..." his hand moved smoothly. Elegantly. "Lux..."
On full alert, he looked around the basement. Softly, intensely, he uttered, "Now, show yourself you b..." He made a big production of looking around before finishing. "Bitch..." he whispered. Ernie glowered disapprovingly.