YouOKLight R7S 78mm(3inch) 5W LED Light Bulbs Daylight 6000K, 360 Degrees Double Ended J Type T3 J78 LED Floodlight Bulb, Replacement for 40W Double Ended Halogen Lamps, 2 Pack Import LED light source: 36 pieces of SMD 2835 LED, we used pure wire LED, can bear above 75 degree of high temperature, long life span more than 25000 hours. Aluminum PCB: We make the 6 pieces of PCB weld together, good for the balance of heat dissipation, good for product life span. Excellent Drive Design: Constant low current design and wide voltage of 90 V ~ 265 V, have over voltage protection function to protect personal safety, we used No.1 brand of Beryl capacitance. Make the product have stable quality and good heat dissipation. Stainless steel both ends and screw: to avoid rusting products in the rain. Before shipment, we have done twice of appearance and function test. And do burn-in test. Make sure each product is good products. YouOKLight LED bulbs are specifically designed for home lighting. When you switch to YouOKLight LED lights you will enjoy energy efficiency without sacrificing light quality. YouOKLight LED bulbs use up to 90 per cent less energy. YouOKLight LED light bulbs can help you transform any living space with beautiful, warm white light and high quality design. Colour temperature in lighting describes how the colour of the light appears from a lamp, measured in kelvins (K). If you want a modern, clean look, you may prefer the cleaner, brighter feel of a cool white lamp (5500-6500K). Choosing a right colour will set the mood of your space. Wide beam angle 360 provides an all-around light distribution - just like an LED Light Tube.