More options of 20W, 30W and 50W Strobe lights can be found in this listing:

http://www.ebay.com/itm/2pc-20W-30W-50W-Disco-Strobe-Light-LED-sound-activated-DJ-disco-ktv-Xmas-/232120493948?ssPageName=STRK:MESE:IT

This LED strobe light is sound activated with other control mode.  It is great for any disco and party.  It's energy saving.

Specification :

* 20W

* Quantity : 3 pc

*AC100-240V 50-60Hz

* Color: Cool White

* Effect: Strobe

* Control mode:Auto, Sound, Strobe

* Materials : Toughened Glass, Metal

* Certification: CE

*Size : 5 1/2" x 4" x 7"