I would check out the blogs at gembared for arguments that you should actually increase exposure time and decrease power for effectiveness. There’s a biphasic response to too much power too fast leading to counterproductive outcomes. Chroma looks legit… but consider backing it up 16-20 inches for more like 20 minutes.

I wish 45 seconds was ideal… nostr:note1rt4n47u9aaedpsezvr947shgx80a8y6465cqvjkw05llx406yp7slfwus7