Metal Halide help

[Owen O Reilly]

I am currently running 150watt 10k bulbs and want to switch to the Phoenix 14k. Would I need to do this slowly so I don't shock the corals.

 

[120reefkeeper]

10k and 14k are the kelvin , not the wattage. Your still 150 watts. Your just fine. 14k will have more of a blue tint to it . [emoji16][emoji41]

 

[greg 45]

The Phoenix 14 k has more blue in it . Also its a new bulb so I would still run a shorted photo period and watch how your tank reacts .

 

[Owen O Reilly]

10k and 14k are the kelvin , not the wattage. Your still 150 watts. Your just fine. 14k will have more of a blue tint to it . [emoji16][emoji41]

Yep I just wasn't sure if it would affect the corals changing the kelvin.

 

[Ocelaris]

The only way you might shock them is if the old bulb is really old. Lumen output on bulbs decreases over time, so a new bulb, even if it's the same wattage and Kelvin can shock them, but for the same aged bulbs a different kelvin will probably not shock them. Some people will raise new bulbs off the tank temporarily until the corals adjust or shorten the illumination period.

 

[Owen O Reilly]

The only way you might shock them is if the old bulb is really old. Lumen output on bulbs decreases over time, so a new bulb, even if it's the same wattage and Kelvin can shock them, but for the same aged bulbs a different kelvin will probably not shock them. Some people will raise new bulbs off the tank temporarily until the corals adjust or shorten the illumination period.

I bought the unit used so i have no idea how old the bulbs are. I have switched the bulbs and the corals are not happy the mushrooms and the anemomes have shrunk. Even the dunkins and a few SPS frags that i have are closed up. The lights are very different from the 150 watts that where in the unit. There is alot of blue.

 

[Ocelaris]

If the corals are retracting, probably a good idea to lower the photo period or raise them until they get used to the new intensity.

 

[saltyfilmfolks]

If the corals are retracting, probably a good idea to lower the photo period or raise them until they get used to the new intensity.

+1

decrease the intensity if you can. a screen or paper over the top of the tank or light. Masking tape if the fix ture is not too hot.
if i remember the charts correctly the Phoenix also has a higher PAR(on the meter) than a radion. SO brighter more intense and slightly higher par could zap them.

same thing here but different lights. Acclimation
https://www.reef2reef.com/threads/lighting-upgrade-with-a-lux-meter-saltyfilmfolks.248417/