These devices are often referred to as "500W", "1000W" and "1500W" - this only refers to the maximum capacity of the LEDs that are mounted onto the units. It does NOT reflect how much energy they consume or relay through photons. They're simple indicators of maximum power capacity of the LEDs which are all 5W capacity LEDs. The Tabletop has 100 LEDs @ 5 watts maximum capacity each. It consumes 120 wattsThe Essential has 200 LEDs @ 5 watts maximum capacity each. It consumes 235 wattsThe Pro has 300 LEDs @ 5 watts maximum capacity each. It consumes 352 wattsThe Ultimate has 1200 LED's @ 5 watts maximum capacity each. It consumes 1500 watts