I too have had good luck and results dealing with SuperBright. I have also had really great success with these 36 LED panels I pick up from various sellers on ebay. http://www.ebay.com/itm/120762392232...84.m1439.l2649
They are coming from Hong Kong so take a while longer, but can't beat the price! If you have any problems, I've never had any issues with the 5-6 sellers in making good on an occasional bad bulb. These particular lights are cool white but bright enough to replace the 921 bulbs. Definitely use far less power. You need one panel for each bulb you replace. I also replace the one over the stove in the hood buy making a lower mounting strip with a piece of aluminum and installing that with 3M dbl stick foam tape. The LED panel is just above the plastic light cover strip, shines straight into stove top and is much brighter in effect than the 921 bulb when up inside the light cavity.
FYI, I did try some so called 'warm white' bulbs direct from a dealer in AZ who advertised 'latest high output', at $15 each. They might have qualified as mood lighting, a nice warm glow .... but the only place they were close to being 'bright' was directly under them, since each LED was encased in a lens that focused the light. I returned them and had to fight for a full refund, including getting a dispute started with AMEx. Never have had those kinds of issues buying on ebay and generally have been very happy with the results.