Below is a chart to help determine the best retrofit aquarium light for your tank based on the dimensions of your tank and the types of corals in the tank.

We separate reef tanks into three categories based on the lighting needs of the organisms in the tank:
  • Reef tanks with soft corals and live rock (low wattage)
  • Reef tanks with soft corals, LPS corals and live rock (medium wattage)
  • Reef tanks with soft corals, LPS & SPS corals and live rock (high wattage)
Basically, soft corals and live rock need the least amount of light. LPS corals need more light that live rock and soft corals. And SPS corals need more light than live rock, soft corals and LPS corals.

This Reef Chart is limited to retrofit lighting for reef tanks with existing canopies. Retrofit lights typically have the bulbs attached to an aluminum reflector that can be attached to the underside of a canopy. For lights for tanks without a canopy, visit the Chart For Choosing the Best Hood Lighting for a Reef Aquarium. We also have a Chart For Choosing the Best Lighting For Planted Tanks & Fish-Only Aquariums.

CF = compact fluorescent (aka power compact)
MH = metal halide
T5 = T5 fluorescent

Aquarium Size
(length X width X depth) 		Reef Tank with Soft Corals and Live Rock Only Reef Tank with Soft Corals, LPS Corals and Live Rock Reef Tank with Soft Corals, LPS & SPS Corals and Live Rock
24" x 12" x 16"
20 gallons
 -24" WavePoint T5 HO 4X24W (96W total)

-AquaticLife T5 HO Ballast Kit 4X24W (96W total)
 -24" WavePoint T5 HO 4X24W (96W total)

-AquaticLife T5 HO Ballast Kit 4X24W (96W total)

 -24" WavePoint T5 HO 4X24W (96W total)

-AquaticLife T5 HO Ballast Kit 4X24W (96W total)

24" x 12" x 20"
25 gallons
 -24" WavePoint T5 HO 4X24W (96W total)

-AquaticLife T5 HO Ballast Kit 4X24W (96W total)

NA
30" x 12" x 12"
20 gallons
 -24" WavePoint T5 HO 4X24W (96W total)

-AquaticLife T5 HO Ballast Kit 4X24W (96W total)		 -24" WavePoint T5 HO 4X24W (96W total)

-AquaticLife T5 HO Ballast Kit 4X24W (96W total)		 NA
30" x 12" x 18"
29 gallons
 -24" WavePoint T5 HO 4X24W (96W total)

-AquaticLife T5 HO Ballast Kit 4X24W (96W total)		 -24" WavePoint T5 HO 4X24W (96W total)

-AquaticLife T5 HO Ballast Kit 4X24W (96W total)		 NA
36" x 15" x 16"
40 gallons
 -36" WavePoint T5 HO 4X39W (156W total)
36" x 15" x 20"
50 gallons
-36" WavePoint T5 HO 4X39W (156W total)

 -36" WavePoint T5 HO 4X39W (156W total)

 -TWO 36" WavePoint T5 HO 4X39W (312W total)

36" x 18" x 18"
50 gallons
 -36" WavePoint T5 HO 4X39W (156W total)


 -TWO 36" WavePoint T5 HO 4X39W (312W total)

36" x 18" x 20"
55 gallons
 -36" WavePoint T5 HO 4X39W (156W total)
36" x 18" x 24"
65 gallons
-TWO 36" WavePoint T5 HO 4X39W (312W total)
48" x 13" x 16"
40 gallons
 -48" WavePoint T5 HO 4X54W (216W total)

 -48" WavePoint T5 HO 4X54W (216W total)
48" x 13" x 20"
55 gallons
 -48" WavePoint T5 HO 4X54W (216W total)
-TWO 48" WavePoint T5 HO 4X54W (432W total)

48" x 15" x 18"
55 gallons
 -48" WavePoint T5 HO 4X54W (216W total)

-TWO 48" WavePoint T5 HO 4X54W (432W total)
48" x 18" x 20"
75 gallons





48" x 18" x 24"
90 gallons
 -TWO 48" WavePoint T5 HO 4X54W (432W total)









48" x 24" x 20"
100 gallons
 -TWO 48" WavePoint T5 HO 4X54W (432W total)





48" x 24" x 30"
150 gallons
 NA
 NA NA
60" x 18" x 20"
100 gallons
 NA NA

 NA
60" x 18" x 24"
125 gallons
 NA

 NA NA
60" x 18" x 30"
140 gallons
 NA NA NA
60" x 24" x 24"
150 gallons
 NA NA NA
60" x 24" x 30"
185 gallons
 NA

 NA NA
72" x 18" x 18"
125 gallons
 NA NA
72" x 18" x 24"
135 gallons
 NA NA NA
72" x 18" x 30"
170 gallons
 NA NA NA
72" x 24" x 20"
150 gallons
 NA NA NA
72" x 24" x 24"
180 gallons
 NA NA

 NA
72" x 24" x 30"
225 gallons
 NA

 NA NA

96" x 24" x 24"
240 gallons
 NA NA NA
96" x 24" x 30"
300 gallons
 NA NA NA