Any A19 bulb works with these trims. Most individuals will use a frosted bulb so that there isn't as much glare. Others have used Neodymium (true daylight) bulbs so that the colors are better. It is simply a matter of trial and error. Everyone is different and likes certain lighting.

We installed the Alzak trims in our home over 20 years ago and have been using the true daylight lamps, only because if you look at one of them along side the regular bulb, you can see a difference in colors. You may want to try this to see which you prefer. The true daylights are more expensive than the regular 60A19 bulb.

Ilitem, thanks so much for taking the time to respond. We'll give the true daylight bulbs a try first. Just didn't expect an answer so easy, since everything else in building has been much more complicated.... :-)