I have tried the light trick, the picture trick and tried feeding near the anemone to get the clowns to take notice...None of them worked...Some people seem to have some success with these methods but then again, it may also be a coincidence in some cases...
After about 5 months I just gave up on the idea and came to terms with it. Then on Monday when I came up to the tank I noticed my female dart away from the location where my GBTA is located. She knew it was feeding time so I fed them and sat back away from the tank and right after feeding she darted in! I almost couldn't believe it!
I really think it is all up to the clown when they feel like hosting. She took no notice in either my GBTA or RBTA for months and out of the blue she decided to make it her home. I'm wondering if this may have something to do with her recent transition to being the female (dominate) of the two. They were both juvenile's when I ordered them, and within the last couple weeks it was clear she was eating like a pig and grew really fast. My male still hasn't joined her, but It's interested to watch the female try to convince him its ok to "dive" in. He will go right up to it and watch her splash around in the anemone and then quickly dart off! And whats even more strange is that he darts to the surface and flutters across it for some reason...Have no idea what that means, but he doesn't seem to be under any distress or anything...Strange.
Anyway, good luck with your clown! My suggestion is to just give them time. When they're ready they will take the plunge. Its definitely a neat thing to experience.