Suggestions and ideas for lighting XL tank with mitras lightbars

[Nicolas_A]

Hi,

My setup :
Freshwater 2000L (3550 x 70 x 80cm)
Aquarium controller : GHL ProfiLux 3.1T eX
Main Filtration : 2 x Royal Exclusiv RD3 Speedy pump 80 Watt / 8,0m³ + Two sumps with bio-balls
UV Filtration : Royal Exclusiv RD3 Mini Speedy 50Watt 5000L/h --> JBL AquaCristal UV-C 36W
Illumination : Maxspect R420R 10000K (160W x 4), 10h on /14 h off, from 0 to 80% in 3 hours
Maintenance : Daily water changes 2.5%
Water parameters : 25-26°C, pH 7.9, GH 7, KH 5, No3 5ppm, Po4 0.05 ppm, Fe 0.05 ppm
Ferts : Easylife Pro
Plants : Ceratophyllum demersum, Cabomba aquatica, Echinodorus amazonicus, Microsorum pteropus, Anacharis Egeria, Hygrophila corymbosa
Fish : Geophagus sp. ‘tapajós red head’, Astronotus ocellatus, Andinoacara rivulatus, Ancistrus sp., Crossocheilus siamensis

I would like to change my razor lamps to mitras lightbars. If I understand correctly I would need :
- Four GHL Mitras Lightbar Daylight 160
- Two Mitras-LB-PSU200 (since there is no 400watt transformer)
- Two Mitras-LB-Splitter
- Two Mitras-LB-Profilux-Cable Interface Cable
- One GHL PLM-RS232 PL-0601 (to add a second RS232)

Question 1 : Do you have any better suggestions ?
Question 2 : According to your "rule of thumb: low light demand: 0,3 watt per liter, very high light demand: 0,9 watt per liter". Is this unit of measurement still relevant for LEDs ?
Question 3 : Even with 4 lightbars I would only have 0.2 watts per L. Is this sufficient ?
Question 4 : Could you tell me what are the PAR/PUR measurements for the GHL Mitras Lightbar Daylight 160 and how they compare to the Razor 160w R420r (see attachement) ?

Razor-PAR.jpg

Thanks for your reply,