I looked at those when I wanted bed lights, thought they were too pricey.
I ended up using two 18" strip LEDs that I bought from a motorcycle vender at the NYC bike show, $18 each.
They are adhesive backed. I stuck 2 of them to a 1/2" piece aluminun angle and then stuck that up under the bed rail.
Put a switch in a small box by the tailgate to operate it. I pull power form a power supply I already have in the tool box.
The two strips on one side light up the entire bed fairly well.
I installed something similar on my father's F350, I used "5m 3528 smd 300 led" strip sourced from ebay (usa shipper) for under $20, added some 22 awg red/black "zip cord" wiring (soldering required) and with the one 5 meter roll added light to the 8' bed in two 30" runs per side and two 2'(ish) per side under the crew cab's doors for puddle lights.
Measurements may be off in my head, so measure it out if you try to duplicate this...
Tied the wiring in for both the bed and puddle lamps to the running board light plug on the frame rail.
If I remember to I'll get some photos of the light if anyone wants to see.
'12 F550 Tux Black Lariat Supercab 186" WB , 4x4 6.7, 19.5GVW
13k lb hooklift, Cramaro auto tarp, Insta-chain automatic tire chains, Boss 9' SD plow, Atomic led cab marker/strobe
Custom~ fabbed rear bumper, tarp gantry, rear warning led setup, SEIC & rear strobe control panel (in the drivers side powerpoint trim)
And more to come
'99 F350 XLT CC LB 4x4 dually 7.3, Dents build character 408,000ish miles on the clock (2nd motor)
'93 Exploder Sport, 5.0 swap, 4r70w+Baumann TCS, Atlas 2 T-case 3.8:1 twin stick, Narrowed D44 '79 f150 solid axle swap, bunch o other junk...
'69 Ford rust bucket, err Bronco, "resto"/mods in the planning stages
Had the recon lights installed a couple weeks back they work great especially under the retrax cover I have they are wired to come on with the interior lights
2012 F250 Lariat 6.7 Golden Bronze 4X4, MBRP Filter Back Duals, Alpine INE-Z928HD, Focal Amp and Speakers and a ton of Dyno Mat, RetraxPro, Clifford Alarm Recon smoked marker/clearance lights, HID Headlights, Rigid D2 Driving Lights (in fog location), Bilstein 5160 shocks,Hellwig Big Wig Sway Bar, Pro Comp 2 Inch Nitro Leveling Kit, Fuel 22" Maverick Wheels , Nitto 325/50R22 Terra Grappler, Westin Bull Bar
Protected by H&KUSP and friends
2006 Hummer H2 (traded for diesel hope never to go back to the dark side (gas)
2005 F250SD SB 4X4 6.0 Harley Edition (traded)
2003 7.3 F350 DRW 4X4 (traded)
2001 7.3 F250 4X4 (traded)