400w Thorn SON Deluxe: full power.

1 x 400w Thorn Deluxe high pressure sodium running at full power.
Deluxe SON lamps have a cooler colour temperature than standard SON lamps and also have a much higher CRI which is better than mercury vapour and some fluorescent!
The only downside is reduced efficiency and lifespan due to the higher temperatures and pressures that these lamps run at.

12,000h
34,000lm
2200k @ CRI 65