Hey everyone, I'm planning on converting my 95 litre, heavily planted, high tech tank currently using a 20W T8 to a custom DIY LED setup. Realistically I don't want to exceed 45W, I've been looking at using Cree XP-G 3W's as I've heard good things about them. Roughly speaking how many would you recommend for a medium light output?
95 litre / 25 US Gal
L80cm x H45cm x D30cm
Pressurized CO2 Injected
TNC Lite Liquid Ferts Weekly
40-50% WC Weekly
1000LPH Cannister Filter
I'm struggling to work out the equation, if anyone could help me please?
LED model Cree XP-G R5
LED current 3
lumen output per LED 118.8 (L)
Height of light from substrate 24 inches (H)
Optic cone angle 60 (probably 60 or 40 degrees) (ø)
I found the working PAR calculator and if i've done it correctly in order to get PAR 50 at 24inches I need to space them 1.38inches apart in a single row. Does this sound about right?
So if my bar is 80cm long (32inches) I need about 24 LED's
I would use one row of LEDs, given that the tank's front to back dimension is only about 12 inches. The lumen output per LED is about 400 lumens, not 120, and this is at 1.5 amps of current. That gives a spacing of 2.5 inches, or about 12-13 LEDs (60 degree optics)