I've had similar experiences with both LED and florescent lights. A second delay gets annoying. I have placed this light in 4 of my properties. None had the delay, however, one had a bad transformer that quit working after a few months. When turned on, it would flash. Returned it to Home Depot and replaced with another and it works fine. Could be a symptom of the transformer being slow to get to voltage. Pretty sure it has nothing to do with the 3-way circuit. As you sound "handy" per your description, you might try getting an old lamp cord wire/plug and connecting it directly to the fixture and plugging it in. If it shows the same delay, I would return it.
Mine have a short delay (about a second). I assume that it "slowly" starts like that to avoid a power surge which could blow the bulbs.
Was not available at the Fairfield, Ct Home Depot
I had the same thing happen to one I purchased a few years ago. I just took it back to Home Depot and they refunded my purchase, then I purchased a new one of the same model. It is still going great.
I would suggest you contact Home Depot either in the store or through phone support customer services as on a recent call for something else not related to these lights they were very helpful & connected me to their supplier. They have a five year warranty so if the problem is related to a warranty claim they should be able to help.
No. This light does not use bulbs. It uses strips of LEDs. It doesn't even have the sockets to plug a T8 into.
Five year manufacture warranty
This is probably a question for a factory rep, but the one thought is possibly you wired the second group in series with the first?? Hot wire going to either switch should always have 120v, independent of the other set of 4. Going to "no voltage" makes it sound like a wiring problem. Good luck!
14 ga. I have installed multiple fixtures, all had 12 ga wire. Had to clip off the connector and use wire nuts to connect.
Yes, you will need to contact manufacturer to get a replacement or change the fixture.