400W MH's inhibiting Photosynthesis......

[DJ88]

Dana Riddle just posted this on Fishnet...

Interesting..

All,

I'm in the initial stages of collecting data with my new PAM meter. In essence, this instrument is a 'photosynthesis meter' and collects information about Photosystem II performance under various light intensities.
Interestingly, some of the corals that we'd expect to do well under 'strong' lighting actually show reduced photosynthetic activity when exposed to light intensity generated by higher output lighting systems (400-watt metal halides, 4-96 watt PCs).

Not only do higher light intensities 'aggravate' photosynthesis (in these cases, anyway), but it is possible one is also throwing money down the drain due to lamp/chiller operational costs.

Dana

<font size="2" face="Verdana, Helvetica, sans-serif">Hee hee.. So my 250W is better than your 400W.. nyah [img]tongue.gif[/img] nyah [img]tongue.gif[/img] nyah.. ;)

Seriously tho.. This is an interesting thing to hear.

Brad you reading this?