On my Ultimate 1 machine I have to take out the bulb and put in the black light bulb in order to use the black light, but on my Millineum I only have to hit a switch and go to the black light. The quilt I was working on, I was using white thread on green and blue fabrics. I didn’t think about using the black light but I accidentally turned the black light on and “wow” I could see the thread so much easier. Here’s how the white thread looks on the fabric.
And here’s how well the thread showed up using the black light.
Being able to see the thread was so much easier on my eyes. I was switching back and forth over the whole quilt after I discovered how well the thread showed up on some of the fabrics. I’ll have to remember to check out the black light more often.:)