A competition on lightbulb in Indonesia is very tight with the marketing development and advanced technology in which the marketer do the selling and will be the best. So, each producer of lightbulb show their exsistance to get the market share of it competitor. Nowdays, the lightbulb from China with various quality. For the various mark of lightbulb in the market provide the consumer with various advantages by choosing the best lightbulb in the lower price. This research a goal to know what are the influence to the influential to the decision of buyer philips light bulb at subdistrict of Medan Johor, and to know what the dominant factor that influence to decision of buyer. Approach that used in this research is survey, with collecting data by interview and giving the question list to responden that ca sample which are 100 society in subdistrict of Medan Johor which measured with likert scala and using statistic model double regresi linier, kinds of this research kuantitatif description and the characteristic research is explanatory research. The result of the research show that all the price, merk and product quality influence the significant to the decision of buyer philips light bulb at subdistrict of Medan Johor, as a partial factors the merk is not influence significant to the decision of buyers, as a partial value coefficient regretion variable price which is 0,674 with significant 0,000 show that price factor influence significant to the decision of buyers and as a partial value coefficient regretion variable product quality which is 0,084 with significant 0,014 show that product quality factor influence significant to the decision of buyers. The conclusion in this research is there are get relation which significant between price, merk and product quality to the decision of buyers, and price and product quality is the dominant influence to the decision of buyers, that’s means the price and product quality is the most factor that certain the level to the decision of buyers philips lightbulb at subdistrict of Medan Johor.

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