What type of light bulb is better than fluorescent light bulbs?

I know that there is a light bulb that is better than a fluorescent light bulb because i heard of it at a earth day event. Im not sure but i think the person said that it was brighter and conserves more energy than a fluorescent light bulb. The only reason that it isnt used as much is because it is much more... show more I know that there is a light bulb that is better than a fluorescent light bulb because i heard of it at a earth day event.
Im not sure but i think the person said that it was brighter and conserves more energy than a fluorescent light bulb. The only reason that it isnt used as much is because it is much more expensive than a fluorescent light bulb.

Can someone tell me what type of light bulb this is?
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