When it comes to hybrid technology, nothing compares to the power of “h”. Lexus’s relentless pursuit of perfection applies to eco-friendly innovation as well, and since 2005 they have led the push to develop hybrid vehicles for the luxury car driver.

Lexus currently has 190,000 hybrids on the road—our four hybrid models account for 97% of all luxury hybrids on the road. These models are the HS 250h, GS 450h, RX 450h and LS 600h L, and between them they provide all the hybrid options a luxury car shopper could desire.

The HS 250h is not only the latest entry into Lexus’s hybrid lineup, it’s the first luxury vehicle specifically designed to be a hybrid instead of just a hybrid version of an existing model. The fact that it was designed only with hybrid technology in mind paid dividends—the 2010 Lexus HS 250h’s Hybrid Drive skillfully integrates the engine, battery and regenerative brakes to deliver 35 mpg, making it the most fuel efficient luxury hybrid in America.

But efficiency is more than just miles per gallon—it’s about emissions. The HS 250h is a Super Ultra-Low Emission Vehicle (SULEVII) due to the fact that it 2.4 liter Atkinson Cycle powerplant works with its electric motor to keep emissions minimal even as it gets 187 horsepower. The HS 250h also utilizes 30% ecological plastics, which are plastics produced from plants instead of petroleum, resulting in a 20% reduction CO2 emissions by 20% during their life cycle. Furthermore, there are four different driving modes available, which provide varying levels of efficiency depending on the situation.

Lexus GS 450h

The world’s first hybrid performance luxury sports sedan is a Lexus. The GS 450h merges the Lexus Hybrid drive with a powerful gasoline engine for an optimally efficient drive that doesn’t sacrifice performance. The GS 450h, like the HS 250h, is a Super Ultra-Low Emission Vehicle (SULEVII), but it packs a 3.5 liter V6 engine that performs like a V8, delivering 340 horsepower and accelerating from 0-60 in 5.2 seconds.

Lexus RX 450h

Lexus knew that it wasn’t only sedans that could benefit from hybrid technology, which is why they created the RX 450h, the world’s first luxury utility hybrid. Its Atkinson Cycle gasoline engine converts more energy generated during engine combustion into mechanical energy which, combined with the RX 450h’s hybrid engine, allows this luxury sport utility vehicle to lead its class with 29 mpg. Those miles are cleaner miles too, as the RX’s produces 70% less smog-forming emissions than its competitors.

The RX 450h doesn’t concede performance in order to achieve its efficiency—its 295 horsepower V6 engine performs like a V8 when needed. However, when seeking to conserve more energy, there’s ECO Mode, which alters the air conditioning’s drain on the engine and regulates throttle response to deliver more efficient acceleration. There’s even EV Mode, where the RX 450h can rely solely on battery power. That’s the flexibility provided by the RX, allowing the driver to choose either power or efficiency depending on the situation.

Lexus LS 600h L

The LS 600h L redefines what a hybrid can be—in fact it’s the world’s first premium luxury hybrid. This means that, in addition to being the most-fuel efficient vehicle in its class, the LS 600h L is rated a Super Ultra-Low Emission Vehicle (SULEVII). It achieves this level of efficiency despite having a muscular 5.0 liter V8 engine that, when paired with its high-output electric-drive motor, gets 438 horsepower and does 0-60 mph in 5.5 seconds.

As a premium luxury car, the LS 600h hybrid comes loaded with cutting-edge technology. These innovative features include an Advanced Pre-Collision System with Driver Attention Monitor, which is designed to alert the unsuspecting driver if a hazard is lurking ahead, and the Advanced Guidance Parking System, which will parallel park the LS 600h with just a little braking from the driver. Furthermore, there’s the LS’s full-time All Wheel Drive (AWD), which ensures necessary traction in all kinds of weather.