Next generation LED technology evolution. Luminous flux is about 500lm in warm white, which is 147% as bright as Pharox's 340lm. Color is warm white. It uses Philips Lumiled. Shape is standard A19 with standard medium screw. It's brightest LED bulbs with similar price. It's good choice for residential and commercial lighting. Lighting EVER High Quality Standard.90 days money back guarantee.