The invention relates to LED lighting technology, more particularly a highpower LED bulbwhich improves heat dissipation effect by improving heat dissipation channelsof an LED bulb.The high power LED bulb comprises a holder, a lamp housing and a lamp shade,the holder isinternally provided with a power module, the lamp housing is internallyprovided with asubstrate and radiators, LEDs are installed on the substrate, sealed in thelamp shade andconnected with the power module, the substrate is provided with a throughhole, the holder is oftubular shape and has a sealed end and an open end extending into the lamphousing andcommunicated with the outside through the through hole, a vent hole isarranged on the holderexposing the lamp housing, and the lamp housing is provided with heatdissipation holescommunicated with the outside through the through hole. The high power LEDbulb greatlyimproves heat dissipation effect of LED bulbs.
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