Xm 20k are blue aswell for the single ended, I am not sure if they come in double ended.... It's been so long since using mh I forgot... You may wanna call OA because they have a sale on bulbs ATM and I know they have some nice bluer double ended bulbs....
Good luck!
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Always looking for the next best coral...
90g starphire cube/400mhRadium20k/2 XHO/2x27w UV/2x39w T5/ 3 Trulumen led strips
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