Realizing LED lights won't solve every solution (yet), I decided to see if there's any recent reviews on the 'As Arri' lights. Here's a recent video post from Vimeo member Black Raven Films showing the As Arri 650W vs the Arri 650W. There seems to be some slight improvments compared to when they were first released.
If you're not up to scoop with the As Arri lights, these are supposed to be so close in design to the Arri with a construction of corrosion resistant extruded and die cast aluminium, they can use the same bulbs, glass, barndoors, diffusers, ballast, scrims, etc. There are several people using these lights, and if you have a set, leave some comments on how they are working out for you. The As Arri lights are available in small 150W to larger 1000W models (found here).
As Arri 150W 300W 500W 650W 1000W Fresnel Lighting
I've had the chance to work with Arri's 650 and 1000 watt lighting kits a few times and they are beautiful. The fresnels allow the lights to be adjusted in Flood or Spot which makes them easier to throw the light where you need it. Of course, they are a bit pricey. Just a few months ago I posted an article about certain lighting kits that claimed to be 'As Arri' found here: http://cheesycam.com/arri-blueline-jietu-fresnel-lighting/
These 'As Arri' lighting kits sold at less than a third the price and claimed to be an exact 1:1 replica of Arri lighting kits. So close in fact many of the replacement parts can be ordered from Arri such as the bulbs, Fresnel glass lens, ballast, barn doors, scrims, etc. They are available in 150, 300, 500, 650, 1000, and 2000 watts. The most common kit being a 3 pc 650w should cover most situations.
Not much information is available on the web, so these still aren't very popular, but just recently a brave soul (Vimeo Member) Josh Donnelly took a chance and posted a video review. Looks like it's time to bump this one back up on the wish list.... [Thanks Josh]
150w - 2000w Fresnel Lighting Kits 'as Arri'