>
>
> From the growell site (more in their paper newsletter about this):
>
> "We now recommend
> that you change your Grolux lamp every crop for maximum efficiency. The
> cost of a new lamp is less than you could lose in yield by not changing."
>
> (They go on to say that the higher output/different spectrum ballance of
> Grolux type HPS tubes is at the cost of lower lumen/life than 'std' HPS,
> as they have proven it to themselves with testing.)
>
> Hype to sell more lamps, or anyone else found this too?
>
>
> These hangers - look good to me and only