Was in Aldi today and picked up their rechargeable led worklight for £20.
No mention of wattage, but rated at 600 lumens and 4 HR run time.
3 yr warranty.
Here's a side by side comparison with an "allegedly" 20w typical Chinese light from eBay.
The Aldi one is much slimmer and compact on the left.
The bigger eBay one is very slightly brighter in practice but only if you look hard enough.
Used it tonight to wash the zed but only managed to clean the wheels before rain stopped play so no piccies of it in action yet.
The QC from an Aldi supplier should be more reliable than the unknown eBay stuff and I'd rather pay the £20 at Aldi than risk taking a punt on an unknown supplier for £17 which is the cheapest I've seen for a 20w one.