Radium 150 watt Metal Halide Bulb?

[Jeff]

I am currently running (2) 14K Ushio 150 watt with 2 T5 actinic bulbs. I am interested in changing to Radium 20K, please let me know your feedback? Thanks

20,000K Radium HQI DE- 150W vs 14,000K Ushio HQI DE - 150W

Sunpod - 48" 2x150 watt HQI DE

 

[jayman10134]

just my opinion but i think that might be a little to blue and you might not get good grow with it.

 

[Jeff.:P]

When I had my MH's I went from a XM 10k to a phoenix 14k to a Radium 20k. The Radium 20k was by far my favorite. Supposedly same if not better Par values then the phoenix. I had great growth from my sps with the Radiums and great color.

 

[jayman10134]

When I had my MH's I went from a XM 10k to a phoenix 14k to a Radium 20k. The Radium 20k was by far my favorite. Supposedly same if not better Par values then the phoenix. I had great growth from my sps with the Radiums and great color.

Really? i was under the impression they had lower par ratings. is there any info on this anywhere?

 

[DoctaQ]

i would think that you could get more growth out of 20k bulbs since bluer light is more useful for coral
i think around 440-460 nm is peak for photosynthesis, its not all about par
plus 20k generally have higher par than 14k.

i thought you had a good thing going on with your lighting and good growth ect, might take your coral some time to adjust to new lighting again.