We were the same as you, we used to use 2 x 4 T bars (equinox) and they were great, but quite heavy and a bit of a pain to carry around.
In the end we we just use 4 of these
https://www.ebay.co.uk/itm/Sound-DMX-Active-RGB-LED-PAR-Stage-Effect-Lights-Spotlight-Disco-DJ-Party-Lamp/283146598440?hash=item41ecda3828:g:pWsAAOSwvktadVc~:rk:8:pf:0
£10 a pop, really basic fade in fade out colourwash, clamp them to the sides of the PA speakers and behind the drummer, haze machine to go with 'em and we're good to go down the dog and duck
they've lasted 3 years and over 100 gigs so far, I just chuck them in the leads box!
These might be bit better though https://www.ebay.co.uk/itm/72W-36LED-RGB-Stage-Par-Light-DMX512-Flat-Lamp-Club-Bar-DJ-Disco-Party-Lighting/222969671827?_trkparms=aid%3D555018%26algo%3DPL.SIM%26ao%3D1%26asc%3D52945%26meid%3D1c89d96e319c48bbb722ec7bf287ec6b%26pid%3D100005%26rk%3D4%26rkt%3D12%26sd%3D173263032567%26itm%3D222969671827&_trksid=p2047675.c100005.m1851