These are not cheapest because they made to strict UL specifications with high quality name brand (not cheapest) LED chips

They emit 50% more light with color temperature similar to direct Sunlight and excellent color rendering index CRI  80 RA

This listing is for a 16 feet 4 inch long LED light strip with 300 pieces of 120° light dispersion angle 3528 SMDs Pure white LED (similar to direct sunlight color temperature is 5000K range, no blue tint!).  Strip contain 300 White LEDs consume only 18 watt (12 volt 1.5 amp DC) while emitting 1600 lumen light equal to 150 watt incandescent light bulb! These strips are made as flexible printed copper circuit board less than 3/8" wide and only 1/8" thick with self adhesive 3M back. Extremely easy to install. Photo below shows an example of kitchen installation - Warm white strip was cut in 3 sections, 1/4" holes were drilled, connecting wires and power supply are hidden in cabinets. Less then one strip (about 12 ft of Warm white strip) is used in this installation. Strip can be cut every 1 -7/8" (3 LEDs), each part can be soldered and powered by the same or additional 12 volt power supply. LEDs spaced less than 5/8" apart, 19 leds per ft.  These strips are perfect for kitchen under cabinet lighting, glass door cabinet lighting, accent, picture and decorative lighting, produce brilliant white light! The light output is equal to 5 x 30 watt halogen bulbs. Please do not confuse with low power strips: these are very bright LEDs and you'll need 12 volt regulated power supply capable of at least 1.5 Amp (1500 mA) output.  Strip shipped with black (-) and red (+) wire leads attached.  The expected life span is more than 50,000 hours.