Why BobbyBulbs exists
Buying bulbs shouldn’t be a guessing game. BobbyBulbs is a planning tool that organizes your lighting upgrade so you purchase the right LEDs—for the right reasons. We cut through marketing, show the specs that matter, and keep your totals accurate.
Clean specs: base, shape, Kelvin, and wattage equivalency—no hype.
You’re upgrading bulbs in your existing fixtures—BobbyBulbs helps you choose LEDs that fit and match.
Energy use = watts × time. We compare LED vs. incandescent and show projected savings (optional).
Understanding Monthly Energy Costs
BobbyBulbs estimates monthly energy for each fixture as:Watts × Bulbs × Hours/Day × 30 ÷ 1000→ kWh, then multiplies by your local $ / kWh. When you pick an LED, we also compute a baseline using that bulb’s listed incandescent equivalent (e.g., a 15 W LED may be a 100 W equivalent), so you can see the potential savings.
Example: A fixture with four 9 W LEDs used 3 hours/day: 9 W × 4 × 3 × 30 ÷ 1000 = 3.24 kWh/mo. At $0.15 /kWh that’s $0.49/mo. If those bulbs replaced 100 W incandescents, the baseline would be 100 W × 4 × 3 × 30 ÷ 1000 = 36 kWh/mo → $5.40/mo, saving about $4.91/mo.
Toggle “Savings — LEDs vs. Incandescents” on the Project page to show or hide the comparison, depending on whether you’re retrofitting from incandescent.
Privacy & disclosure
Accounts exist so multiple people can save progress. We don’t sell personal data.
As an Amazon Associate, we may earn from qualifying purchases. Prices and availability are controlled by Amazon.
Ready to plan?
Build your plan and send it to one cart. When you’re ready, check out on Amazon.