It depends on what you consider inexpensive. You can buy them almost anywhere. They usually come at least 6 to a package and cost about $30-$50 but I found mine at a hardware store and got 12 for $20. You have to make sure they have full sun all day or they won't charge good. Google solar lighting or check out eBay.

Light (Dependant) Reactions of Photosynthesis Animation

3Pcs Outdoor Garden Solar Powered Pathway Wall LED Landscape Fence Light Lamp $20.99

3Pcs Outdoor Garden Solar Powered Pathway Wall LED Landscape Fence Light Lamp $15.00

3Pcs Outdoor Garden Solar Powered Pathway Wall LED Landscape Fence Light Lamp $16.50

Solar Powered 16 LED Motion Sensor PIR Wall Mount Garden Pathway Light Landscape $19.99

3x Outdoor Garden Wall Solar Powered LED Pathway Wall Landscape Fence Light Lamp $13.50

3x Outdoor Garden Wall Solar Powered LED Pathway Wall Landscape Fence Light Lamp $15.00

3x Outdoor Garden Wall Solar Powered LED Pathway Wall Landscape Fence Light Lamp $14.50

12 x Stainless Steel Color Changing Solar Lights Pathway Lawn Garden Landscape $32.99

Lot Of 6 Solar Outdoor Accent Light 2 LEDs Pathway, Stair Steps, Flower Bed BL02 $17.99

Outdoor Garden Path Pathway Solar Powered LED Landscape Light Lamp $2.50

Moonrays 99924 Color-Changing Glass Ball Fixture $10.00 Mesmerizing. Watch the colors in the glass ball slowly change from one to another. Group several fixtures together in a flowerbed for an especially striking effect. Crackle glass ball. 7 color changing LED. Rechargeable NiCd battery (included). 17'' high....

Moonrays 91743 Hudson Solar-Powered Metal 2X LED Path Light, Pearl Bronze, 6-Pack $26.76 Ribbed plastic lens. Powered by the sun, no wiring required. Warm white LED never needs replacing, wide angle beam. 18" area of illumination, 2.5 lumens per fixture. Rechargeable battery included....

Mr. Beams MB 542 Battery Powered Motion Sensing LED Remote Path Light, 2-Pack $39.99 Mr. Beams Intelligent LED Battery-Operated Lights Battery Powered Motion Sensing LED Remote-Controlled Path Light Features Attach a path light anywhere: on your sidewalk, steps, yard, front porch, in your garden and more. The MB542 from Mr. Beams can be wall mounted or can mount to a stake that can be driven into the ground. Mr. Beams offers simple installation with no wiring and no electrician n...

ABC Products - 3 Inch x 80 inch ~ Aluminum - Lamp Post (Matte Black Finish)* $24.87 Made of durable aluminum - Will not rust ~~ Easy to install ~~ 3 inch diameter outdoor lamp post 80 inchs long ~~ Black finish ~~ Fits Standard Post Lights....

Sunforce 86115 Solar Garden Lights pack of 10 $41.52 Sunforce 10-pk. of solar garden lights with bright LEDs automatically turn on at night to illuminate yard or garden. Application: Outdoor, Light Type: LED, Power Source: Solar, Light Color: White, Batteries Required: Yes, included, Lights Included (qty.): 10...