Odyssea 48" 760 Watt Metal Halide Lighting System
2-250 watt DE HQI metal halide bulbs 15000k, 4-65 watt 03 actinics, 6 dual LED moonlights
metal halide
17 posts • Page 2 of 2
-
schigara - Posts: 468
- Joined: Fri Mar 14, 2008 5:42 pm
That is a nice fixture. With 260 of those watts being power compacts, I would not worry much about w/gallon overkill. The watt per gallon rule is a very bad and inaccurate rule.
Watt for Watt, a PC bulb produces very little PAR compared to a Halide bulb and halide bulbs vary greatly in the amount of PAR produced by what type, brand, and K rating.
You have 2 250w DE halides. All those PC bulbs equal 260W but don't even come close to producing the PAR of just one of those halides.
I would agree that the Halides should be run no longer than 6-7 hours per day.
It's up to you how to acclimate to the new light and everything mentioned so far is sound advice.
1. Reduce photoperiod to 2-3 hrs per day and add an hour each week until you reach 6 or 7 hrs per day.
2. Keep a photoperiod of 6-7 hours and raise the light to about 18-24inches above water and then lower the fixture a few inches per week.
3. Maintain 6-7 hr period and height of 7-12in above surface and use a series of diffusers in between the light and tank and remove one diffuser a week until they have all been removed.
You are not dealing with 760w of intense grow light. You have 500w of intense grow light and 260w of aesthetic light.
Watt for Watt, a PC bulb produces very little PAR compared to a Halide bulb and halide bulbs vary greatly in the amount of PAR produced by what type, brand, and K rating.
You have 2 250w DE halides. All those PC bulbs equal 260W but don't even come close to producing the PAR of just one of those halides.
I would agree that the Halides should be run no longer than 6-7 hours per day.
It's up to you how to acclimate to the new light and everything mentioned so far is sound advice.
1. Reduce photoperiod to 2-3 hrs per day and add an hour each week until you reach 6 or 7 hrs per day.
2. Keep a photoperiod of 6-7 hours and raise the light to about 18-24inches above water and then lower the fixture a few inches per week.
3. Maintain 6-7 hr period and height of 7-12in above surface and use a series of diffusers in between the light and tank and remove one diffuser a week until they have all been removed.
You are not dealing with 760w of intense grow light. You have 500w of intense grow light and 260w of aesthetic light.
