T5 Bulbs
ATI T5 high output bulbs

T5 Bulbs

Impeccable quality T5 bulbs at a great value


Beautiful coral color.
Even better growth.

More than 17 years of proven results since their introduction to the market in 2000. ATI T5 bulbs use the latest advances in phosphors (which make the color) and manufacturing techniques to produce bulbs with higher output, better coloration, and more stability.

Renowned for quality

The #1 selling reef specialty T5 bulb line is trusted and used at every level of the aquarium industry; manufacturers, corals farmers, shop owners and everyday hobbyists.

Watch your coral grow

ATI’s unique assortment of bulb options help bring out a wide range of colors in corals and makes fluorescent capable corals really pop. Just pick the bulbs that meet your personal color preference and plug it in.

Aquablue Special bulb chart

Aquablue Special

Combines the properties of a full-spectrum bulb with an elevated blue color peak producing a bulb with an approximate color temperature of 15,000K.

Blue Plus bulb chart

Blue Plus

Widely regarded as the most popular reef aquarium T5 bulb of all time, Blue Plus combines the properties of a blue bulb (approximately 460nm) with an actinic bulb (approximately 420nm). This produces an intense blue light with high PAR numbers and a light spectrum that encourages both coloration in SPS corals and fluorescence in capable corals. It also helps balance washed out/yellow-hued tanks. Recommended as a supplement to LEDs and metal halides and commonly used for sunrise and sunset applications in T5 set ups.

Coral Plus bulb chart

Coral Plus

Combines the properties of a Blue Plus (~50%), Aquablue Special (~40%) and Purple Plus (~10%) producing a bulb with a cool, crisp white color with hints of red and blue. The higher blue component compared to an Aquablue Special produces better fluorescence in capable corals and the red component is excellent for color rendition. Approximate color temperature of 15000K+.

Purple Plus bulb chart

Purple Plus

Combines the properties of a full spectrum bulb with strong red and blue components, producing a bulb with excellent color rendition that works very well to bring out pinks, purples and reds in an aquarium. Recommended in combination with at least two or more other T5 bulbs.

True Actinic bulb chart

True Actinic

Produces a violet-blue light that is designed to maximize fluorescence in capable corals and make livestock colors pop. Color spectrum peaks at 421nm. Usually just one per fixture is used to add additional fluorescence to the system. Recommended as a supplement to LEDs and metal halides and commonly used for sunrise and sunset applications in T5 set ups.

energy efficient


T5 power consumption is comparable to most LED fixtures


ATI bulbs are also very affordable, making them the preferred choice of hobbyists around the world.

German made

German design & engineering

Made in Germany to ATI's exact specifications by one of the largest and most respected bulb manufacturer's in the world.



30 day fail-to-fire warranty. If your bulb fails within 30 days from the date of purchase just bring it back to your retailer for a no hassle exchange


Item #DescriptionEnergyLength
ATI1101Aquablue Special (24"/24W)24 watts22.2 in.
ATI1103Aquablue Special (36"/39W)39 watts34.0 in.
ATI1105Aquablue Special (48"/54W)54 watts45.8 in.
ATI1107Aquablue Special (60"/80W)80 watts57.6 in.
ATI1109Blue Plus (24"/24W)24 watts22.2 in.
ATI1111Blue Plus (36"/39W)39 watts34.0 in.
ATI1113Blue Plus (48"/54W)54 watts45.8 in.
ATI1115Blue Plus (60"/80W)80 watts57.6 in.
ATI1117True Actinic (24"/24W)24 watts22.2 in.
ATI1119True Actinic (36"/39W)39 watts34.0 in.
Item #DescriptionEnergyLength
ATI1121True Actinic (48"/54W) 54 watts45.8 in.
ATI1123True Actinic (60"/80W)80 watts60 in.
ATI1125Purple Plus (24"/24W)24 watts22.2 in.
ATI1127Purple Plus (36"/39W)39 watts34.0 in.
ATI1129Purple Plus (48"/54W)54 watts45.8 in.
ATI1131Purple Plus (60"/80W)80 watts57.6 in.
ATI1133Coral Plus (24"/24W)24 watts22.2 in.
ATI1135Coral Plus (36"/39W)80 watts34.0 in.
ATI1137Coral Plus (48"/54W)54 watts45.8 in.
ATI1139Coral Plus (60"/80W)80 watts57.6 in.

Contact your local ATI dealer and ask for ATI T5 bulbs.