I have a pre-lit tree (10ft) that is now 19 years old. Together with a lighting professional I learned how to repair lamps very well. The tree uses 2.5 volt incandescent bulbs at 170mA. Each individual strand has 50 bulbs. The light intensity is just right. You need to know the voltage, wattage (or amperage), and number of bulbs per filament to get it right. If you don't achieve this, you will have a light that is too bright or too dim, and you also run the risk of blowing too much current through the entire strand. They have pinched bottoms, all my previous pears were rounded but they still fit my bases very well. I will update the review if anything changes. Ordered 4 more as replacements.
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