Generally, it is better to pack 4 tubes of T5HO or 2 tubes of PL55W positive grass in a 60cm cylinder.
It is recommended not to use lamp holders with miscellaneous brands to save money, try to choose some lamp holders with big brands to ensure the quality, and do not change the lamps at both ends once every three days. Actually, growing aquatic plants is more expensive. Under normal circumstances, the lights are changed once every 1-2 years, but after ten thousand years, four T5HO lights will exceed 150.
Recommend a more economical brand lamp holder:
Odyssey lamp holder T5HO 24w*2 60CM
Odyssey PL single lamp fish tank black lamp holder 65Wx 1 60cm
Apollo STS-600 aquarium lamp holder T5 14X360cm
Tyrannosaurus Rex T5HO 24w*2 60CM, a master aquatic plant in Taiwan Province Province.
Taiwan Province Huihong Water Plant Master Tyrannosaurus Double Lights PL55W*2 60CM
Tyrannosaurus rex T5HO24X360cm, a master of aquatic plants in Taiwan Province Province.
Odyssey T5HO 24w*4 60cm
T5 lamp has 2 or 4 tubes, depending on the aquatic plants you grow, 2 tubes can be used for negative grass and 4 tubes for positive grass.
Of course, there are many other brands, you can go to Taobao to search.