I highly recommend NLee the Engineer's reviews on Amazon http://www.amazon.com/gp/pdp/profile/AOEAD7DPLZE53?filter=review http://www.amazon.com/gp/pdp/profile/A

I highly recommend NLee the Engineer's reviews on Amazon http://www.amazon.com/gp/pdp/profile/AOEAD7DPLZE53?filter=review http://www.amazon.com/gp/pdp/profile/AOEAD7DPLZE53?filter=re... (you can also get it as RSS) Heavily covered are various light bulbs and rechargeable batteries. That includes checking power against manufacturer claims, noise, dimmability, power factor etc.