A: I'm sure there are lot of codes on the bulb that record; plant, line, date, and a lot of other information. These 'codes' are generally no published; there is no need to do so . They are generally used for production control. Kind of like a can of soup from the grocery store, that may be need to recalled. I've never had a LED bulb failure, unless it failed within minutes/seconds of installation. I'm not a lawyer, but I think the onus is on you to substantiate purchase / ownership warranty claims.
A: CREE is great to work with. There is a full model number stamped on the bulb, you might need a magnifying glass to read it. Just call their customer service number and give them that info and what’s wrong with the bulb.
A: If you still have the proof of purchase and you paid it with your credit card, I’m sure HomeDepot can pull up the purchase transaction and print out the receipt. 2nd, I haven’t been in this situation before. I’m sure Cree company will issue a replacement bulb for as long as you have the proof of purchase. Don’t quote me on that. But you can at least try and talk to them and go from there.
A: To my knowledge, there is no warranty on these light bulbs.
A: If it will fit and is not exposed to 120 degrees or higher for prolonged periods. Hotter than this will shorten the life.
A: I would think the limiting factor is; how hot does your range hood get? The bulb is all plastic (except for the contacts) and I don't know what temperature it is rated for. I'd guess it is good for an ambient temperature around 110°F ~ 120°F. It may indicate it on the package that I no longer have. Also this bulb has a small 'candelabra' base (~ 1/2" diameter) and my range hood uses a 'standard' Edison base (~ 1" in diameter).
A: I don't know but it SHOU;D work fine.
A: Probably not. It has a candelabra base which is much smaller than the bulbs for my particular range hood which takes a standard lamp bulb base.
A: The problem is likely caused by the switch that runs your lamppost. Most dusk-to-dawn- sensors are NOT compatible with LED lights. There are some switches that are, but unless you've replaced that sensor very recently, it's most likely not. Try the light bulb in another light/lamp in your house that is not on a sensor or dimmer.
A: Insufficient information for me to understand your question. Do they screw in. What is the voltage on your lamppost?