Anyone heard of LPS lights instead of HPS lights

i was wondering i havea 2x2 grow space and i currently have 200 watts of 5500k cfl's in there . i was wondering instead of using a 150watt hps witch releases alot of heat, has anyone ever used a lps light? it stands for Low Pressure Sodium. Supposably they produce very little heat unlike the High Pressure Sodium lights. i was looking into buying a 180 LPS light . the Kelvin on LPS lights are lower the HPS lights also witch is better. most HPS lights reange from 2000k and the LPS is 1700k witch is better. And 180 watt LPS has 32,000 Lumens so thats perfect for my grow space( reccomended atleast 5,000 lumens per every 1x1 space in grow area) so since mine is 2x2 i need 10,00 lumens and i got 32,000 so it should be waayyyy better. so whats people's experience on LPS lights if you have any? has anybody heard bad stuff or good stuff about these lgihts?
Link to the LPS light
http://www.1000bulbs.com/product/4766/LPS-151167.html

Hps ftw win

Low pressure sodium is an inferior grow light. It does not produce anywhere near as many lumens per watt in a usable spectrum. They are used in industrial lighting usually in situations that call for less light. I know that some rural areas only use lps lighting as street lights because of how much less light bleeds up into the sky to disrupt the view of the stars.

The real smart money is in plasma lighting. It kicks the ass off hps and uses half the power with 80% less heat. The major drawback is the cost though. A 300 watt lamp will run you about $1400.00 but it will out perform a 600 watt hps and last for 10 years...

They just released a 500 watt that replaces the 1000 hps. Even if it is $2000 I'm fucking getting one.

I've always wondered about those too, thanks JG. =)

plasma grow light is where its at. Ive never seen a light like this. No heat disperse, with a full spectrum and a 6 year bulb life. However, you cant get the sulfur plasmas because they dont last as long and they are fucking huge compared to these other plasmas. I got mine at confidentiallightingsolutions.com check them out there worth it trust me.