... popular in our worldwide clients' markets. LED tube power meter,LED tester,Power meter,Demo boxLT-AC11021,Input voltage : ... be AC 200V-250V,50Hz. If test LED lamp or other lamps without ballast inside the meter ... ballast inside could test T8 fluorescent tubes of 20W(60cm),30W(90cm),36W(120cm) and 58W ... circuit.11,Compact size, small volume, very light , convenient to carry Best after sales-servicesWith ...