Of course it is you want to know why?
<climbs on to soap box>
the T-5 HO lighting is a very skinny tube and with the use of the icecap reflectors or the Tek reflectors which are very effective thus allowing you to keep the anenomes you see, sps in the higher regions as well as clams on the sand bed. Amazing? Yes, check out RJwilsons tank that i've attached a pic of. Hes moved on to metal halides as i will around chrismas time when I upgrade to a 120 since its 4" taller and even with the great reflectors, I dont want to push 20". Mine is 20" with sand bed 21" witout
<dismounts soap box>